[Solved] Postfix: “queue file write error”

Postfix: Queue File Write Error

If you get an error like: Apr 15 12:41:03 webb4 postfix/sendmail[11234]: fatal: web1_user(12967): queue file write error in your mail log, then the value for message_size_limit in postfix main.cf is too low. Solve Postfix queue file write error Edit postfix main.cf: nano /etc/postfix/main.cf and set the message size limit to a higher value. E.g. message_size_limit ... Read more

How to Backup/Clear/Restore a SpamAssassin Bayes Database

SpamAssassin Bayes Database

Sometimes you might have to work with the Spamassin Bayes Token database. This is the database that is used by the SpamAssassin Self Learning (Bayesian) Classifier to store the ham and spam tokens. This tutorial will show you how to make a backup of that database. E.g. when you want to move it to a ... Read more

Solution for: fatal: open database /var/lib/postfix/smtpd_scache.db: File exists

If your mail server stops working (neither incoming nor outgoing email works) and you find the following error message in the mail.log file: fatal: open database /var/lib/postfix/smtpd_scache.db: File exists then the smtpd_scache.db might got corrupted. Postfix will recreate this file if it does not exist. So it can be removed to solve the issue: /etc/init.d/postfix ... Read more

Solution for amavisd error – TROUBLE in process_request: Error writing a SMTP response to the socket: Broken pipe – on OpenVZ server

If you get error messages from amavisd similar to the one posted below on a server which is virtualized with OpenVZ: Mar  5 09:09:02 v100 amavis[17378]: (17378-14) (!!)TROUBLE in process_request: Error writing a SMTP response to the socket: Broken pipe at (eval 100) line 987, <GEN44> line 31. then the issue can be caused by ... Read more

Setting up email routing to gmail / google apps via ISPConfig 3

The following guide describes the steps to add DNS records that route emails from a domain managed in ISPConfig 3 to google apps / gmail. The guide assumes that you have already setup the dns zone for your domain in ispconfig. Login to ISPConfig, click on the DNS module icon in the upper navigation bar, ... Read more

Enhanced e-mail SPAM protection in ISPConfig 3

The command below enables a stricter SPAM handling for postfix on ISPConfig 3 servers. In Detail: Reject sender hostnames with invalid syntax Reject sender hostnames that are no fully qualified domains (e.g. reject "server1" but allow server1.domain.tld) Reject sender domains that have no DNS records Check sender IP addresses against realtime blacklists. First make a ... Read more

How to change the welcome email message text in ISPConfig 3

As of ISPConfig 3.0.4, the text of the welcome email message that is sent to new email accounts is stored in the folder /usr/local/ispconfig/server/conf/mail/. The message has this format: ------------------------------------------------------------------------ From: ISPConfig <[email protected]> Subject: Welcome to your new email account. Welcome to your new email account. Your webmaster. ------------------------------------------------------------------------ The first line starts with "From: ... Read more

Send all outgoing email trough one IP address in postfix

When a server has more than one IP address, then postfix will use all IP addresses randomly to send out emails. This can cause your emails to be listed as SPAM on other servers because the sending IP does not match the reverse IP of the server hostname. The solution is to bind postfix to ... Read more

Fix for OpenSuSE error: postfix/master: fatal: 0.0.0.0:smtps: Servname not supported for ai_socktype

You might see the error: postfix/master[5309]: fatal: 0.0.0.0:smtps: Servname not supported for ai_socktype On a OpenSuSE server when you enable smtps in postfix master.cf file. The reason for the error is that the definition of the smtps port in /etc/services is missing. Solution Edit the /etc/services file vi /etc/services and add the following lines: smtps ... Read more