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SquirrelMail: 127 Can't execute command

Major Hayden — Mon, 08 Sep 2008 17:16:00 +0000

I found a Plesk 8.3 server running RHEL 4 last month that was presenting errors when users attempted to send e-mail via SquirrelMail:

ERROR: Email delivery error Server replied: 127 Can't execute command '/usr/sbin/sendmail -i -t -fsomeuser@somedomain.com'.

The error was appearing because safe_mode was enabled and SquirrelMail was unable to drop e-mails into /usr/sbin/squirrelmail. After disabling safe_mode on the server, the users were able to send e-mails via SquirrelMail.

SquirrelMail: 127 Can't execute command is a post from: Major Hayden's Racker Hacker blog.

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Basic procmail configuration with spamassassin filtering

Major Hayden — Wed, 13 Aug 2008 17:00:48 +0000

I've used this extremely basic procmail configuration a million times, and it's a great start for any server configuration. It passes e-mails through spamassassin (if they're smaller than 256KB) and then filters any e-mail marked as spam to /dev/null:

LOGFILE=/var/log/procmail.log DROPPRIVS=yes


:0fw

| /usr/bin/spamc

:0 * ^X-Spam-Status: Yes /dev/null

Of course, you can make this much more complicated with some additional customization.

Basic procmail configuration with spamassassin filtering is a post from: Major Hayden's Racker Hacker blog.

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sendmail: savemail panic

Major Hayden — Mon, 18 Feb 2008 18:56:37 +0000

If you see a large mail queue and your system's I/O is increasing, you may find messages like these in your syslog:

Losing q5/qfg9N5EwE3004499: savemail panic SYSERR(root): savemail: cannot save rejected email anywhere

In this situation, there's some reason why sendmail cannot deliver e-mail to the postmaster address. There's a few issues that can create this problem:

Missing postmaster alias in /etc/aliases
Hard disk is full
The mail spool for the postmaster has the wrong ownership
The mbox file for the postmaster is over 2GB and procmail can't deliver the e-mail

First, correct the situation that is preventing sendmail from delivering the e-mail to the postmaster user. Then, stop sendmail, clear the e-mail queue, and start sendmail again.

I found this issue on a Red Hat Enterprise Linux 4 server and then found the solution on Brandon's site.

sendmail: savemail panic is a post from: Major Hayden's Racker Hacker blog.

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