Debugging Common Email Delivery Issues
Diagnose and fix the most common problems with email delivery, bounces, and inbox placement.
Smtp
9 articles tagged with "Smtp"
Configuring Amazon SES with AcelleMail
Step-by-step guide to connecting Amazon Simple Email Service as your sending server in AcelleMail.
Return-Path and Envelope Sender Explained
The Return-Path header controls where bounce notifications go. Learn how it differs from the From address and why alignment matters for DMARC.
Email Throttling and Rate Limits Explained
Each ESP and ISP enforces its own sending rate limits. Learn the per-provider limits and how to configure throttling in AcelleMail to stay within them.
Configuring Multiple Sending Servers
Use a pool of sending servers to distribute campaign load, achieve IP rotation, and set up automatic failover when one server goes down.
How Email Delivery Actually Works
Follow a single email from your "Send" button to the recipient's inbox — covering MTA handoff, SMTP conversation, DNS MX lookup, and TLS negotiation.
Dedicated vs Shared IP Address
Choosing between a dedicated and shared IP affects your sender reputation and warmup requirements. This guide compares both options with clear recommendations.
IP Warmup Schedule for New Sending Servers
A proven warmup schedule to build sender reputation on new IPs without getting blocked by ISPs.
Understanding Email Bounce Types
Hard bounces and soft bounces behave very differently. Learn the SMTP codes behind each type and how AcelleMail handles them to protect your sender reputation.