Category Archives: Mail

Debugging high Roundcube server load

Posted on June 19, 2010 by segfault

Recently I’ve been attempting to fix a problem with high load on a server that is dedicated to serving Roundcube Webmail. The load issue appeared after migrating users off Squirrelmail and onto Roundcube. The symptoms are: high load average and … Continue reading →

Posted in Mail, Web Serving | Tagged , | 2 Comments

Debugging Exim with a fake SMTP session

Posted on July 31, 2007 by segfault

When you’re modifying your Exim configuration, for example setting up spam filtering, virus scanning or DNS blacklisting, it’s common practice to connect to Exim over telnet to see whether your new configuration works as expected. While this works well, you … Continue reading →

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Choosing a good DNS blacklist

Posted on July 31, 2007 by segfault

SANS has a good article on choosing a DNS blacklist. It’s very important that you pick your blacklists carefully. I’ve seen some business Exchange servers hosted on DSL lines that use some fairly restrictive DNS blacklists with the result being … Continue reading →

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Multiple identities in Apple Mail.app

Posted on June 23, 2007 by segfault

After trying to figure out how to set up multiple identities using only one account in Apple Mail.app and failing, I found this tip that explains how to do it.

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MTA comparison

Posted on May 1, 2007 by segfault

shearer.org has a MTA comparison that you might find useful if you’re wondering what MTA to use on your server. I’ve used Postfix and Sendmail before and I much prefer Exim for a variety of reasons. If you use Debian, … Continue reading →

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Exim DNS blacklist HOWTO

Posted on April 13, 2007 by segfault

I’m assuming that you’re using Debian Etch and also that you’re using the split Exim configuration. If you’re not using the split configuration or you aren’t sure which configuration you’re using, follow the instructions but make all the edits in … Continue reading →

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Mail server survey

Posted on April 10, 2007 by segfault

O’Reilly has a good article about a recent MTA survey. Open source MTA’s still account for a large percentage of all the MTA’s found.

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Procmail, Dovecot and Maildir

Posted on April 6, 2007 by segfault

If you’re using Dovecot as your POP3/IMAP server and want to use Procmail to filter your mail into different Maildir folders, unless you set up your .procmailrc variables exactly right, Dovecot will have problems with it. For an explanation, see … Continue reading →

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Making Exim and ClamAV play nicely

Posted on March 30, 2007 by segfault

It’s fairly easy to get Exim and ClamAV to work together, but there are are couple of gotchas. I’m assuming that you’re using Debian (I used Debian Etch). First, install ClamAV: apt-get install clamav clamav-daemon Then uncomment and edit the … Continue reading →

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Spamassassin and trusted networks tip

Posted on March 30, 2007 by segfault

I set up a new mail server yesterday and used SA-Exim in conjuntion with Exim to deal with processing the mail. However I noticed from the mail headers in my emails that Spamassassin thought all my mail was coming from … Continue reading →

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