> Could you add a -v or 2 to the smtpd invocation, that will generate a > bunch more logging, which might help narrow it down.
Added -vv. Here's the end of the story. Apparently it crashes shortly after the AUTH GSSAPI exchange. BTW I tried both in a chroot and without, with same result, but since I didn't get other SASL methods to work in chroot (didn't try very hard), so I have disabled it for now. Oct 27 09:50:18 kakmonster postfix/smtpd[14940]: > kelev.home.better.se[192.168.100.4]: 250-8BITMIME Oct 27 09:50:18 kakmonster postfix/smtpd[14940]: > kelev.home.better.se[192.168.100.4]: 250 DSN Oct 27 09:50:18 kakmonster postfix/smtpd[14940]: watchdog_pat: 0x809c908 Oct 27 09:50:18 kakmonster postfix/smtpd[14940]: < kelev.home.better.se[192.168.100.4]: AUTH GSSAPI 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 Oct 27 09:50:18 kakmonster postfix/smtpd[14940]: xsasl_cyrus_server_first: sasl_method GSSAPI, init_response 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 Oct 27 09:50:18 kakmonster postfix/smtpd[14940]: xsasl_cyrus_server_first: decoded initial response `??8??*?H??????? Oct 27 09:50:18 kakmonster postfix/master[14931]: warning: process /usr/lib/postfix/smtpd pid 14940 killed by signal 11 Oct 27 09:50:18 kakmonster postfix/master[14931]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling
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