smtp transport process returned non-zero status 0x000b: terminated by signal 11

Update: Nov 19, 2009:

This seems to be a filedescriptor limit issue. If that is the case, then the suggestions in this guide may help: Start off with solution #2 to remove all of the ErrorLog entires to free up some filedescriptors.

Also, after increasing the FD_SETSIZE value in #3 and #4, do a full exim source recompile, as well as an apache/php recompile (#3).

Previous suggestions:

If you are receiving this error in your /var/log/exim/mainlog:

2006-01-10 23:01:14 1EwHYJ-0002q0-6y == user@domain.com R=lookuphost T=remote_smtp defer (-1): smtp transport process returned non-zero status 0x000b: terminated by signal 11

Then you can fix the issue by editing your /etc/exim.conf, and changing the following code:

remote_smtp:
  driver = smtp

To be:

remote_smtp:
  driver = smtp
  hosts_avoid_tls=*

Save, exit, then restart exim.

If the issue is for incoming email, you can comment out this section of your exim.conf:

tls_advertise_hosts = *

then restart exim.

Related: I'm a Directadmin user on FreeBSD 6.1. Whenever i send a mail using php's mail() function i see the following in my mainlog:

R=lookuphost T=remote_smtp defer (-1): smtp transport process returned non-zero s tatus 0x000b: terminated by signal 11 Frozen

Sending mail on the commandline or from a webmail program (squirrelmail) works fine. Tried many suggestions such as putting 'hosts_avoid_tls = *' under remote_smtp: in exim.conf. No use.

Also used several OpenSSL and Exim versions and upgraded the OS. Doesn't work either. Many Directadmin users seem to have the same problem going after the directadmin forum.