# E-mail Overview #### Email: A Reliable Deliverability Engine ​Email messages form the foundation of digital communication. The MessageFlow infrastructure handles the full message lifecycle and ensures the highest deliverability. Manage bulk campaigns from an intuitive panel or integrate your own systems for handling marketing and transactional traffic via API and SMTP. The Email API channel enables the physical separation of both traffic streams, protecting critical system notifications from the impact of bulk campaigns on throughput and sending speed. ​ #### Panel Campaigns (Marketing) The optimal module for bulk communication, newsletter distribution, and recurring promotional offers. Built for marketing teams that require visual content management, send scheduling, and seamless collaboration on contact segmentation. * **Design flexibility**: Build messages from scratch in a Drag & Drop editor or upload your own HTML code. * **Content optimization**: Use the AI assistant to generate high-performing subject lines. Run A/B tests on a small sample of recipients to automatically send the winning version to the rest of your list. * **Unlimited sending**: Enjoy unlimited sends on the Advanced and Prime plans. Pricing is based on list size, not the number of campaigns sent. * **Cross-channel Booster**: Drive conversions with automated follow-ups. Set up a reminder SMS to be sent to recipients who did not open your email. * **Data visualization**: Analyze engagement using heatmaps and create segments from recipients who clicked specific links with just a single click. #### Email API & SMTP (Transactional & Automation) ​ Infrastructure dedicated to system notifications requiring real-time, instant deliverability. Integrate this module directly with external e-commerce platforms, CRM systems, or your own applications under a flexible Pay-as-you-grow model, bypassing any artificial rate limits. ​ * **Integration methods**: Use the RESTful API for full control in modern applications or the universal SMTP Relay for legacy systems. * **Dynamic templates (server-side)**: Decouple the presentation layer from your application logic. Send only the template ID and variables in JSON format, allowing the system to substitute data on the fly. * **MessageFlow Priority**: Activate a dedicated routing layer for critical notifications. This mechanism guarantees priority handling for 2FA codes and security alerts by bypassing the standard sending queue. * **Full observability**: Receive delivery statuses via webhooks in real time. Use the panel's searchable log explorer to locate a specific email in seconds based on the Message-ID or recipient address. #### Deliverability Foundation ​ The MessageFlow infrastructure actively protects your sender reputation. ​ * **Test sandbox domain**: Immediately after account activation, the system automatically assigns you a sandbox domain. This allows you to start testing sends in the panel and via API/SMTP right away, with no DNS configuration required. Treat this solely as a technical validation tool. The test domain does not guarantee high deliverability and is permanently removed along with all associated sender addresses when upgrading to a paid plan. * **DNS configuration wizard**: Generate ready-to-use SPF, DKIM, and DMARC records to properly authorize messages from your own domain and begin regular production sends. Learn more: \[Sender Authorization] * **Reputation management**: The system automatically suppresses re-sending to addresses returning a hard bounce error and filters out known spam traps. * **IP strategy**: Start sending on high-quality shared IP addresses. As your volume grows, move to a dedicated IP address for full control over your own reputation with inbox providers. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.messageflow.com/email/e-mail-overview.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.