Program terminated with signal 11, Segmentation fault. #0 0x00007fb71ea7c3b1 in __strlen_sse2 () from /lib64/libc.so.6
This is a rare known issue with the MTA service that can occur when resolving some SPF records.
Messaging Gateway 10.7 before 10.7.4n
This issue has been resolved in Messaging Gateway 10.7.4. Upgrade at your earliest convenience.