[CentOS] Dovecot on CentOS5 - (login) returned error 127

Tim Alberts wrote:
> Feb 21 15:41:21 cartman dovecot: pop3-login: pop3-login: error while loading shared libraries: libsepol.so.1: failed to map segment from shared object: Cannot allocate memory
>   

this is a wild guess, and should be taken with a grain or three of salt.

you might try increasing kernel parameter shmmax.   this is in 
/etc/sysctl.conf, or can be manually set for experimentation with sysctl(8)