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

I'm getting the following message when using mail() from php. It only happens with some applications, such as WHMCS my billing software, wordpress and a few others, however squirrelmail and roundcube are fine.

2008-04-09 10:34:15 1JjMOL-0007Yp-OS == [email protected] R=lookuphost T=remote_smtp defer (-1): smtp transport process returned non-zero status 0x000b: terminated by signal 11

The message goes if I unfreeze it myself using "exim -d -M <message-id>"

I've read the bugs and fixes at:
http://bugs.exim.org/show_bug.cgi?id=384
http://www.directadmin.com/forum/showthread.php?s=&threadid=14533&perpage=20&pagenumber=2
http://help.directadmin.com/item.php?id=114
http://help.directadmin.com/item.php?id=9
And many more.

I've recompiled exim (from source as I required WITH_CONTENT_SCAN=yes for clamav), I've recompiled php and even apache. I've tried installing openssl which I now have, I've tried uncommenting the following lines and even modifying their paths:
SUPPORT_TLS=yes
TLS_LIBS=-lssl -lcrypto
TLS_LIBS=-L/usr/local/lib/ -lssl -lcrypto
TLS_INCLUDE=-I/usr/local/include/openssl/ -I/usr/kerberos/include
#TLS_LIBS=-L/usr/local/openssl/lib -lssl -lcrypto
#TLS_INCLUDE=-I/usr/local/include/openssl/
#TLS_INCLUDE=-I/usr/local/openssl/include/ -I/usr/kerberos/include

If I leave only SUPPORT_TLS=yes , I get the following compile error
: undefined reference to `SSL_accept'
tls.o(.text+0x15a2): In function `tls_server_start':
: undefined reference to `ERR_get_error'
tls.o(.text+0x15b2): In function `tls_server_start':
: undefined reference to `ERR_error_string'
tls.o(.text+0x1706): In function `tls_server_start':
: undefined reference to `SSL_get_shared_ciphers'
*** Error code 1

Stop in /tmp/exim-4.69/build-FreeBSD-i386.
*** Error code 1

Stop in /tmp/exim-4.69.


Please help!!
Thanks in advance