I have qmail 1.03 with several patches including qmail-smtpd-auth-0.4.3
and vpopmail 5.4.33.
After upgrading Debian 6 -> 7, I broke SMTP-AUTH *only* when using
stunnel for SSL.
When trying to auth over stunnel4, i see:
454 oops, problem with child and I can't auth (#4.3.0)
Jun 21 23:19:29 s4 vpopmail: vchkpw-smtps: (PLAIN) login success
using smtp-auth on port 25 or 587 works fine.
i modified smtps.conf to use strace like:
exec = /usr/bin/strace
execargs = /usr/bin/strace -ff -o /tmp/vchkpw.dump
/var/qmail/bin/qmail-smtpd /home/vpopmail/bin/vchkpw /bin/true
the dumps are at:
i tried increasing & just removing softlimit.
i tried recompiling/reinstalling vpopmail
I dont think the problem is with stunnel since the SSL layer is working
I'm out of ideas. More eyes please ?