HTTP Request workflows
32 results — all source-linked n8n references
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Monitor weekly LLM share of voice with OpenRouter, Google Sheets, and email reports
Quick overview This workflow runs weekly to query multiple LLMs via OpenRouter with prompts from Google Sheets, analyzes brand mentions and domain citations, aggregates weekly Share of Voice metrics, and emails an HTML visibility report. How it works Runs every week on a schedule trigger. Reads active prompts from a Google Sheets “prompts” tab and expands them into multiple model runs (including repeated runs per model) to create OpenRouter chat completion requests. Sends each request to OpenRouter, normalizes the response into answer text and extracted citation URLs, and appends the results to the Google Sheets “runs” tab. Loads brand definitions from the Google Sheets “brands” tab, scans the latest successful runs for brand mentions and matching citation domains, and writes one mention/citation record per brand-run to the “mentions” tab. Aggregates the mention and citation results into weekly metrics per model (and an “all models” total), including mention rate, citation rate, Share of Voice, and average first-mention position, and appends them to the “weekly_agg” tab. Builds an HTML report that compares the current week to the previous week, flags alerts (SoV drop > 5pp or citat
WCollect post-purchase product reviews with WooCommerce, Google Sheets, and SMTP
Quick overview This workflow sends post-purchase review request emails for WooCommerce orders, stores expiring form links in Google Sheets, optionally shortens links with Dub.co and delays delivery, serves a hosted rating form via n8n webhooks, and submits collected reviews back to WooCommerce. How it works Receives an order completion event via a WooCommerce webhook or an external POST webhook and returns a 200 OK response. Normalizes the incoming order payload, generates a unique form token and expiry, and builds a customer-specific review form URL. Fetches each product’s image and permalink from the WooCommerce REST API, aggregates the product list, and appends the form record to a Google Sheets tab. Optionally shortens the form URL using the Dub.co API and optionally waits a configured number of days before sending the message. Renders an HTML email containing the ordered products and the review link and sends it via SMTP to the customer. When the customer opens the review link, looks up the form token in Google Sheets, validates status/expiry, and serves either the multi-product rating form HTML or an error page. When the form is submitted, validates the token again, posts eac
Send SAP Business One low stock alerts via WhatsApp and email
Quick overview This workflow polls SAP Business One every 6 hours for active, unfrozen items whose on-hand quantity is below the minimum inventory level, then sends de-duplicated low-stock alerts via WhatsApp (Meta API) and email, storing the last-alerted quantity in an n8n Data Table to prevent repeated notifications. How it works Runs every 6 hours on a schedule. Logs in to SAP Business One Service Layer and queries the Items endpoint for valid, non-frozen items where QuantityOnStock is less than MinInventoryQuantity. Splits the SAP response into one item per record and skips the alert flow if no items are returned. Looks up each item’s previous alert state in an n8n Data Table and only continues if the item has never been alerted before or its stock has dropped further since the last alert. Formats a WhatsApp message and an HTML email (including an “out of stock” message when QuantityOnStock is 0). Sends the alert via the WhatsApp Business Cloud API (Meta Graph API) and via SMTP email, then upserts the latest alerted quantity to the Data Table. Logs out of SAP Business One. Setup Configure SAP Business One Service Layer access by updating the server URL in the SAP login, item qu
Send a daily Microsoft 365 update digest with OpenAI GPT-4o-mini via email
Quick overview This workflow runs daily at 07:00 to pull the latest Microsoft 365, Security & Compliance, and Teams blog RSS posts, uses OpenAI (gpt-4o-mini) to triage and format a prioritized HTML digest, and sends the results to your team via SMTP email. How it works Runs every day at 07:00 on a schedule. Fetches RSS XML from three Microsoft Tech Community feeds (Microsoft 365 Blog, Security & Compliance, and Teams/Microsoft Teams Blog) in parallel. Parses the RSS items, keeps only posts from the last 24 hours, and deduplicates updates by title across all feeds. If no new items are found, sends a “no new updates” email via SMTP. If new items are found, aggregates them into a single formatted list for analysis. Sends the aggregated updates to the OpenAI Chat Completions API (gpt-4o-mini) to assign priority/category/action-required and generate an inline-CSS HTML email body. Emails the generated HTML digest to the configured recipients via SMTP. Setup Create an OpenAI API key and add an HTTP Header Auth credential that sets Authorization: Bearer for the OpenAI request. Add an SMTP credential for the email-sending nodes. Update the fromEmail and toEmail fields in both email actions
Monitor website changes with PolyDoc screenshots and email alerts
Quick Overview This workflow checks a website URL every 6 hours, detects content changes by hashing the normalized HTML, and when a change is found it uses PolyDoc to capture a full-page screenshot and emails the PNG as an attachment. How it works Runs every 6 hours on a schedule. Sets the target URL to monitor and fetches the page HTML with an HTTP request. Normalizes the HTML (removing scripts/styles/comments), hashes it, and compares it with the previous run stored in workflow static data. If the hash changed, PolyDoc captures a full-page PNG screenshot of the URL. Sends an email with the screenshot attached and the monitored URL in the subject and body. Setup Update the monitored website URL in the Settings step. Add your PolyDoc API credentials to the PolyDoc screenshot step. Configure an SMTP email credential and set the to/from email addresses in the email step.
WGenerate Videos Automatically with Veo3 Fast API, Google Drive & Email Notifications
Automated Video Generation, Google Drive Upload, and Email Notification with Veo 3 Fast API This workflow automates the process of generating videos using the Veo 3 Fast API, uploading the video to Google Drive, and notifying the user via email. All tasks are executed seamlessly, ensuring a smooth user experience with automatic error handling. Node-by-Node Explanation On Form Submission: Triggers the workflow when a user submits a form with a prompt. Veo 3 Fast API Processor: Sends the user's prompt to the Veo 3 Fast API to generate a video. Wait for API Response: Pauses the workflow for 35 seconds to allow the API response. API Request: Check Task Status: Sends a request to check the status of the video generation task. Condition: Task Output Status: Evaluates whether the task was successful, still processing, or failed. Wait for Task to Complete: Pauses the workflow for 30 seconds to recheck the task status if processing is ongoing. Send Email: API Error - Task Failed: Sends an email if the task fails to generate the video. Send Email: API Error - Task ID Missing: Sends an email if the task ID is missing in the response. Download Video: Downloads the processed video from the prov
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Generate Custom Branded PDF Invoices from QuickBooks and Email to Clients
Automated QuickBooks Invoice to Custom PDF & Email This n8n workflow automates the entire QuickBooks invoicing process — from creation to delivery. When a new invoice is generated in QuickBooks Online, it automatically fetches the data, applies your company branding, converts it into a professional multi-page PDF via Gotenberg, and emails it directly to your client. Key Features: ⚡ Fully Automated: Triggers instantly on new QuickBooks invoices. 🧾 Custom Branding: Adds your logo and signature from public URLs. 🎨 Modern PDF Design: Clean, professional multi-page layout with smart totals and “Page X of Y” footers. 📧 Automatic Emailing: Sends the final PDF in a formatted email to your customer. Requirements: QuickBooks Online, n8n instance, Gotenberg (HTML→PDF converter), and public URLs for logo/signature.
WAutomated IMDB Video Downloader with Google Drive Upload & Email Alerts
Automated IMDB Video Downloader: Download, Upload to Google Drive & Notify via Email Easily download IMDB videos via a user-friendly form. Automatically fetch video links using the IMDB Downloader API, save videos to Google Drive, and notify users via email with shareable links or failure alerts. Perfect for content creators and marketers. Node-by-Node Explanation On form submission**: Triggers the workflow when a user submits an IMDB video URL via a form. Fetch IMDB Video Info from API: Sends the URL to the **IMDB Downloader API to get video metadata and download links. Check API Response Status**: Verifies if the API responded successfully (status code 200). Download Video File**: Downloads the video from the provided media URL. Upload Video to Google Drive**: Uploads the downloaded video file to a specified Google Drive folder. Google Drive Set Permission**: Sets sharing permissions on the uploaded video for easy access. Success Notification Email with Drive Link**: Emails the user the Google Drive link to access the video. Processing Delay**: Adds a wait time before sending failure notifications. Failure Notification Email**: Emails the user if the video download or processing
Two-Factor Authentication with ClickSend Voice Calls and Email Verification
N8N Workflow: Send and Check TTS (Text-to-speech) Voice Calls with Email Verification This workflow automates a two-factor verification process using a voice call and an email. It is designed to send a text-to-speech (TTS) voice call with a verification code and, upon successful voice verification, to send an email with a second verification code. How it Works This workflow automates the process of sending voice calls for verification and combines it with email verification. It uses the ClickSend API for the voice call and an SMTP integration for sending the email. Use Cases Two-factor authentication (2FA) for user registration or login. Automated verification for phone numbers and email addresses. Building a custom verification system for web applications. Setup Instructions ClickSend API: Register on ClickSend and obtain your API Key. In the Send Voice node, create a Basic Auth credential using your ClickSend username and API Key as the password. SMTP Credentials: In the Send Email node, you must set up your SMTP credentials for the sender's email. Workflow Logic Trigger: The workflow is started by submitting a form. Set Voice Code: The workflow sets a predefined voice verificati
Daily Stock Market Report with Twelve Data API Sent via WhatsApp and Email
This workflow automates the generation of a daily stock market report, identifying the top gainers and losers among the top 100 stocks. It fetches real-time stock data, processes it to highlight significant price movements, and delivers formatted alerts via WhatsApp and email. Quick Notes Ensure the Twelve Data API key and stock symbols are correctly configured. Verify recipient lists for WhatsApp and email alerts are up-to-date. Confirm the workflow triggers at 5:00 PM (IST) from Monday to Friday. Process Flow Trigger the workflow daily at 5:00 PM (IST) with the Daily Market Change Trigger node. Configure API key, stock symbols, and alert recipients using the Configuration Variables node. Fetch stock data from Twelve Data API with the Fetch Stock Data from Twelve Data node. Process stock data to identify top gainers and losers with the Process Stock Movements node. Format WhatsApp messages with the Format WhatsApp Message node. Send WhatsApp alerts with the Send WhatsApp Alert node. Format email content with the Format Email Content node. Send email alerts with the Send Email Alert node. Output Getting Started Import the workflow into n8n and configure Twelve Data API credentials.
WReal-Time Security Threat Dashboard with Google Sheets, AI Risk Analysis & Email Alerts
👤 Who it’s for Blue Team leads, CISOs, and SOC managers who want automated visibility into threat metrics, endpoint alerts, and response actions — without needing a full SIEM or BI platform. Great for teams using Modules 1–5 and now ready to report, review, or share BlueOps data across stakeholders. ⚙️ How it works / What it does Fetches threat + response data from up to 5 Google Sheets Aggregates data into four key slices: summary_metrics: Total threats, actions, endpoints daily_trends: Time-based charting top_assets: High-risk endpoints or systems actions_taken: Logged IR activity Generates a clean HTML report and sends via email Logs report summary to a central reporting tracker sheet Optionally converts and stores PDF versions or links 🛠️ How to set up Google Sheets: Connect your live sheets from previous BlueOps modules (M1–M5) Email Setup: Insert sender credentials and recipient(s) Customize Your Charts: Edit the “📈 Format Charts” and “📋 Structure Report Body” nodes Trigger Options: Run weekly, monthly, or on-demand via Webhook/Cron Add PDF Generator (Optional): Use Puppeteer, HTML → PDF services, or internal scripts 📋 Requirements Google account with access to all BlueO
WYouTube to MP3 Converter with RapidAPI - Upload to Drive & Email Link
📥 YouTube to MP3 Converter Workflow – Auto Upload to Google Drive & Email Link with RapidAPI This n8n workflow allows users to convert any YouTube video to MP3 using the YouTube To MP3 Fast API on RapidAPI. It handles the entire process end-to-end — from form input to automatic delivery via email with cloud storage. 🔁 How It Works 📝 User Form Input Users submit a YouTube URL and their email through a simple form. 🎬 MP3 Conversion The video URL is sent to the YouTube To MP3 Fast API on RapidAPI to process and convert into MP3 format. ⏳ Wait for Processing Introduces a short delay to ensure the file is ready for download. 📥 File Download The converted MP3 file is downloaded securely. ☁️ Google Drive Upload The MP3 is uploaded to Google Drive for cloud-based access and storage. 🔗 Share Permissions Permissions are updated to allow anyone with the link to access the MP3. 📧 Email Notification The final download link is emailed to the user. ✅ Benefits Completely Automated** – From input to email, everything runs without manual effort. Cloud Storage Integration** – Files are saved to your Google Drive for easy management. User-Friendly** – Simple interface for users to get their MP3
Client Feedback Collector & Analyzer (Form → AI Summary → Email + Social Draft)
What this workflow does This n8n workflow collects client feedback through a form (Tally, Typeform, or Google Forms) and uses AI to analyze it. It automatically generates a summary of the positive points, highlights areas for improvement, and drafts a short social media post based on the feedback. Ideal for: Freelancers Customer support teams Online service providers Coaches and educators Setup steps Connect your form tool to the Webhook node (POST method) and make sure it sends a feedback field. Add your DeepSeek (or other GPT-compatible) API key to the AI request node. Configure the email node with your SMTP credentials and desired recipient address. Replace the Telegram node with Slack, Buffer, or another integration if you prefer. (Optional) Customize the prompt in the function node for different tone/language. 🕐 Estimated setup time: ~15 minutes 💬 Sticky notes are included and clearly positioned to guide you. Technologies used n8n Webhook node n8n Function node DeepSeek Chat or compatible AI API Email node (SMTP) Telegram node (or other integration) Sticky Notes for setup guidance Use cases Analyze feedback from onboarding or satisfaction surveys Create ready-to-publish soci
WYouTube to WhatsApp Sales Automation with WordPress, FluentCRM and Whinta
🚀 WhatsApp Automation Template Designed & Developed by Infridet Solutions Private Limited 🔧 Objective: Automate your lead nurturing and sales process from YouTube/Instagram → Landing Page → CRM → Email → WhatsApp → Sales → Deal Closure using tools like: 🌐 WordPress (Landing Page + Fluent Forms) 🧾 Google Sheets (Backup Log) 📩 FluentCRM (Lead Tagging + Email Sequences) 💬 Whinta.com (WhatsApp Messaging API) ⚙️ N8N (Workflow Automation Engine) 🧩 System Flow Overview: Lead Source: YouTube or Instagram CTA Landing Page: Built on WordPress with a story-driven design Form Capture: Fluent Forms with dynamic input fields Data Sync: Backup to Google Sheets Push lead to FluentCRM and tag as New Lead Email Sequence: Warm-up emails (1 to 5) Introduce offer or service WhatsApp Outreach: Send personalized message via Whinta Triggered 1 hour after form fill or last email Sales Follow-Up: Sales team handles replies manually CRM tag updated to Customer upon closing 📁 Folder Structure (Optional Git/Zip File): 📦 WhatsApp-Automation-Infridet/ │ ├── whatsapp-automation-n8n.json # N8N Flowchart Import File ├── email-templates.docx # Warm-up Email Scripts ├── whinta-api-integration.pdf # API Docum
WTrack Amazon Product Prices with ScrapeOps API & Google Sheets Alerts
Amazon Product Price Tracker This workflow automatically monitors Amazon product prices, tracks price changes, and sends alerts when significant price fluctuations occur. Built with ScrapeOps' structured data API, it provides a reliable, maintenance-free solution for price tracking without worrying about anti-bot measures or complex selectors. What This Workflow Does Monitors multiple Amazon products simultaneously using their ASINs Calculates both absolute and percentage price changes Sends customizable email alerts when prices cross defined thresholds Maintains a historical record of all price data for trend analysis Updates a Google Sheets with the latest price information Prerequisites A ScrapeOps API key (register at https://scrapeops.io) Google account for Google Sheets integration SMTP email configuration for alerts Setup Instructions Spreadsheet Setup Make a copy of the template spreadsheet: https://docs.google.com/spreadsheets/d/1hRv-TBXrpN6rkIU65WorttNHt-IPWas_An0sF4Of39U Add your Amazon product ASINs in the "Products to Monitor" sheet Set your desired alert thresholds for price increases/decreases Workflow Configuration Add your ScrapeOps API key to the "Setup" node Upda
Automate Digital Delivery After PayPal Purchase Using n8n
Automate Digital Delivery After PayPal Purchase Using n8n A Complete Step-by-Step Guide to Seamless Template Delivery Built by Amjid Ali – SyncBricks Deliver personalized files instantly after PayPal transactions using n8n – without writing a single backend line. 🚀 What This n8n Workflow Does This automation template helps you automatically deliver a digital product (such as an n8n template or JSON file) to customers who pay via PayPal — within seconds. You can: Automatically extract customer info Identify what was purchased Send a clean, branded email with the product file Promote your other courses, books, and tools 📦 Use Case Example Product: AI-Powered Social Media Content Generator & Publisher When a customer buys this product through PayPal, this automation: Listens for a successful payment event Fetches order details via API Sends an HTML email with the template attached Promotes your other offerings with embedded links 🔧 Prerequisites You’ll need: An n8n instance (self-hosted or n8n Cloud) A PayPal developer account PayPal OAuth2 credentials configured in n8n Your product hosted as a downloadable .json file (Oracle, Dropbox, GitHub, etc.) SMTP email credentials in n8n 🧠
Automated Property Lead Generation with BatchData and CRM Integration
How It Works This N8N workflow creates an automated system for discovering high-potential real estate investment opportunities. The workflow runs on a customizable schedule to scan the market for properties that match your specific criteria, then alerts your team about the most promising leads. The process follows these steps: Connects to BatchData API on a regular schedule to search for properties matching your parameters Compares new results with previous scans to identify new listings and property changes Applies intelligent filtering to focus on high-potential opportunities (high equity, absentee owners, etc.) Retrieves comprehensive property details and owner information for qualified leads Delivers formatted alerts through multiple channels (email and Slack/Teams) Each email alert includes detailed property information, owner details, equity percentage, and a direct Google Maps link to view the property location. The workflow also posts concise notifications to your team's communication channels for quick updates. Who It's For This workflow is designed for: Real Estate Investors: Find off-market properties with high equity and motivated sellers Real Estate Agents: Identify po
Automated YouTube Subscription Notifications with RSS and Email
Who is this template for? You are in the bad habit of always checking your feed to see if there are new videos? This workflow will help you get rid of this habit by delivering an email notification for each new video posted from the channels you are subscribed to. No need to check your feed again: no email = no new video. Example email How it works Every hour (by default), we: Fetch all your YouTube subscriptions from the YouTube Data v3 API. Get a list of the latest videos of each channel through RSS (we don't use YouTube's API for this step as it would put us over the daily quota). Send you a simple yet beautiful email for each new video that was published since the last run of the workflow. To go to the video, simply click on the thumbnail. Caveats Because of the way this workflow is implemented, if your n8n instance stops, you will not get emails for the videos you missed when your instance is back online. The situation could be improved if n8n gave us an easy way to access the last successful execution's timestamp. Set up instructions Complete the Set up credentials step when you first open the workflow. You'll need YouTube OAuth2 API and SMTP credentials. In the Send an email
WTrack n8n Community Topics with Keywords and Save to Google Sheets
This template is designed for community managers, developers, and enthusiasts who want to monitor and capture discussions on the n8n community forum by specific keywords. By tracking new topics that match your provided keyword, the workflow automatically logs them into a Google Sheet, helping you keep a pulse on trending discussions and manage community insights effortlessly. How it Works Keyword Monitoring: The workflow continuously monitors the n8n community forum for new topics containing your specified keyword. Data Extraction: When a matching topic is found, relevant details such as id, title, URL, and posting time are extracted. Google Sheets Integration: The extracted information is automatically appended as a new row in your Google Sheet, providing an organized log of community discussions. Alert Option: Optionally, you can add notifications (e.g., Slack messages or emails) to alert you when a new topic is captured, ensuring you never miss an important update. Set Up Steps Import the Workflow: Download and import the workflow into your n8n instance. Configure Keyword Monitoring: In the HTTP Request node, set your desired keyword to filter the n8n community topics. Set Up Go
MFA Multi-factor authentication (Voice call and Email) with ClickSend and SMTP
This workflow automates the process of sending voice calls for verification purposes and combines it with email verification. It uses the ClickSend API for voice calls and integrates with SMTP for email verification. This workflow is a powerful tool for automating phone and email verification, ensuring a seamless and secure user verification process. Below is a breakdown of the workflow: 1. How It Works The workflow is designed to verify a user's phone number and email address through a combination of voice calls and email verification. Here's how it works: Form Submission: The workflow starts with a Form Trigger node, where users submit a form with the following fields: To: The recipient's phone number (including the international prefix, e.g., +1xxxx). Voice: The voice type (male or female). Lang: The language for the voice call (e.g., en-us, it-it, fr-fr, etc.). Email: The recipient's email address. Name: The recipient's name. Set Voice Code: The Set Voice Code node defines the verification code that will be spoken during the voice call. Format Code for Voice: The Code for Voice node formats the verification code by adding spaces between characters for better clarity during the
WUnique QRcode coupon assignment and validation for Lead Generation with SuiteCRM
This workflow is designed to manage the assignment and validation of unique QR code coupons within a lead generation system with SuiteCRM. How it Works This workflow automates the process of assigning unique QR code coupons to leads generated through a form submission, ensuring no duplicates are created, and validating the usage of coupons. Here's how it operates: Webhook Trigger: The workflow starts with a Webhook node that listens for incoming requests containing QR code data. A Set coupon node extracts the QR code value from the request parameters. Validation of QR Code: An If node checks if the QR code exists in the incoming data. If it does, the process proceeds; otherwise, a "No coupon" response is sent back. Coupon Lookup: The Get Lead node queries a Google Sheets document to check if the QR code corresponds to an existing lead. A subsequent Not used? node verifies whether the coupon has already been used by checking the "USED COUPON?" field in the sheet. Lead Duplication Check: When a new lead submits the form (On form submission), the Duplicate Lead? node checks if the email already exists in the system to prevent duplicates. Coupon Assignment: If the lead is not a duplica
Docker Registry Cleanup Workflow
Docker Registry Cleanup Template This template is designed to automatically clean up old image tags in the Docker registry and perform garbage collection. Features List all images in the registry Preserve the last 10 tags for each image (latest tag is always preserved) Delete old tags Email notification for Successful/Excused cancellation Registry garbage collection automation Failure notification in error conditions Prerequisites Docker Registry v2 API access Basic Authentication credentials SMTP email settings (for notifications) SSH node installed on n8n (for garbage collection) Installation 1. Identity Information Add the following credentials in n8n: HTTP Basic Auth**: For Registry access SSH Private Key**: For Garbage collection command Email SMTP**: For notifications 2. Set Variables Replace your-registry-url with your actual registry URL on all nodes: ‘url": ‘https://your.registry.com/v2/_catalog’. Customisation Retention Policy: Set the number of tags to be retained by changing the slice(0, 10) value in the Identify Tags to Remove node Schedule: Change the frequency of operation at the Trigger node Notification Content: Customise email templates according to your needs Not
Todoist weekly email of completed tasks
This workflow template helps Todoist users get a weekly overview of their completed tasks via email, making it easier to review their past week. Why use this workflow? Todoist doesn’t provide completed task reports or filters in its built-in reports or n8n app. This workflow solves that by using Todoist’s public API to fetch your completed tasks. How it works Runs every Friday afternoon (or manually). Uses the Todoist public API to retrieve completed tasks. Excludes specific projects you set (e.g., a grocery list). Sends an email summary, grouping tasks by the day they were completed. Set up steps Copy your Todoist API token (found here). Create a Todoist API credential in n8n. Create an SMTP credential in n8n. Alternatively, use a preferred email service like Brevo, Mailjet, etc. Import this workflow template. In the Get completed tasks via Todoist API step, select your Todoist API credential. In the Send Email step: Select your SMTP credential. Set the sender and recipient email addresses. Run the workflow manually and check your inbox! Ignoring specific projects If you do not want your grocery list, workouts, or other tasks from specific Todoist projects showing up in your weekl
Daily GitHub Release notification by Email
Automating daily notifications of the latest releases from a GitHub repository. This template is ideal for developers and project managers looking to stay up-to-date with software updates. How it Works: Daily Trigger: The workflow initiates daily using the Schedule Trigger node. Fetch Repository Data: The HTTP Request node retrieves the latest release details from the specified GitHub repository. Check if new: The IF node check if the release was done in the last 24 hours. Split Content: The Split Out node processes the JSON response to extract and structure relevant data. Convert Markdown: The Markdown node converts release notes from Markdown format to HTML, making them ready to use in emails. Send a notification by email Key Features: Simple to customize by modifying the GitHub URL. Automatically processes and formats release notes for better readability. Modular design, allowing integration with other workflows like Gmail or Slack notifications. Setup Steps: Modify Repository URL: Update the Sticky Note node with the URL of the repository you want to monitor. Modify SMTP details: Update the Send Email node with your SMTP details.