How to config default Return-Path in php mail
Some mail servers reject messages sent by PHP scripts with this error: (host ezylinux.com[74.xx.xxx.xxx] said: 550-Verification failed for 550-The mail server could
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Mail.
5 articles on this topic
How to delete messages from mail queue
How to delete messages from the queues of different MTAs, using an example mail queue to show the available commands.
Managing Cyrus IMAP server - Cyrus system administration
Cyrus IMAP is a well-known POP3 and IMAP server that can also act as an MDA, or Mail Delivery Agent. These commands manage its configuration and troubleshoot problems.
Restrict some users to sending mail only to internal domain
Postfix is a highly flexible MTA. This article explains how to restrict selected users to sending mail only to specified domains or within the company.
The "Mailbox is locked by POP server" problem
Cyrus-imapd commonly reports "Mailbox is locked by POP server" when more than one POP3 connection attempts to retrieve mail for the same user simultaneously.