Hi, I like to share with FS community a strange issue, now fixed, since it seems many people has problems with sendmail and FS. I've a couple of servers with Debian 6.0.7 and FreeSWITCH Version 1.5.1b. A working configuration for voicemail and fax2mail (tested on same distribution) didn't work: same old sendmail segfault error. My previous Freeswitch version was last stable (1.2.8) and the issue was always there. Mail failed even calling system sendmail from FS_cli. Rising log on sendmail I've seen that mail passed by FS to sendmail, generated a parsing error on '@' char. So I changed my lua test script as follow: freeswitch.email("testmail@yahoo.it", "info", "subject:Prova\n\n", "Prova.") Note the missing '@mydomain.it' on from argument of the function. I'm not so expert to explain why, but now everything works as expected! Hope this info is useful for someone.