Okay, here is a weird one... I'm running OBSD 4.5. I am using it as a mail server, using sendmail 8.14.3. I rebuilt sendmail because I wanted to use smtpauth.
So I put "WANT_SMTPAUTH=yes" in my /etc/mk.conf, and rebuilt according to the docs. All seemed to go well. I configured my sendmail.mc/sendmail.cf, and still, all seemed to go well. All my tests on sending emails were successful -- until I started sending emails with attachments. Every time I send an email with a large attachment (say 5-15mb). Tiny attachments go through just fine. On my email server, if I send an attachment with mutt (for example) to another email server, the file will queue in /var/spool/mqueue as one would expect. After about 1/2 a second, my server will lock-up, and be completely unreachable by network or keyboard. Furthermore there is absolutely no error output in /var/log/maillog or in /var/log/messages. This is replicable from another mua as well, I have tried this on Horde and kmail. The results are the same. I don't think I have anything wrong in my sendmail.cf, but, fwiw, here it is. I appreciate the help! Chris OSTYPE(openbsd)dnl define(`confPRIVACY_FLAGS', `authwarnings,needmailhelo,noexpn,novrfy,nobodyreturn')dnl define(`confCW_FILE', `-o MAIL_SETTINGS_DIR`'local-host-names')dnl define(`confCT_FILE', `-o MAIL_SETTINGS_DIR`'trusted-users')dnl FEATURE(nouucp, `reject')dnl FEATURE(`access_db', `hash -o -T<TMPF> /etc/mail/access')dnl FEATURE(`blacklist_recipients')dnl FEATURE(`use_cw_file')dnl FEATURE(`mailertable', `hash -o /etc/mail/mailertable')dnl FEATURE(`use_ct_file')dnl FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable')dnl FEATURE(genericstable, `hash -o /etc/mail/genericstable')dnl FEATURE(always_add_domain)dnl FEATURE(redirect)dnl FEATURE(`no_default_msa')dnl DAEMON_OPTIONS(`Family=inet, Address=0.0.0.0, Name=MTA')dnl DAEMON_OPTIONS(`Family=inet6, Address=::, Name=MTA6, M=O')dnl DAEMON_OPTIONS(`Family=inet, Address=0.0.0.0, Port=587, Name=MSA, M=E')dnl DAEMON_OPTIONS(`Family=inet6, Address=::, Port=587, Name=MSA6, M=O, M=E')dnl CLIENT_OPTIONS(`Family=inet, Address=0.0.0.0')dnl CLIENT_OPTIONS(`Family=inet6, Address=::')dnl define(`confBIND_OPTS', `WorkAroundBrokenAAAA')dnl define(`CERT_DIR', `MAIL_SETTINGS_DIR`'certs')dnl define(`confCACERT_PATH', `CERT_DIR')dnl define(`confCACERT', `CERT_DIR/cri.pem')dnl define(`confSERVER_CERT', `CERT_DIR/cri.pem')dnl define(`confSERVER_KEY', `CERT_DIR/cri.pem')dnl define(`confCLIENT_CERT', `CERT_DIR/cri.pem')dnl define(`confCLIENT_KEY', `CERT_DIR/cri.pem')dnl define(`confAUTH_MECHANISMS',`PLAIN LOGIN CRAM-MD5 DIGEST-MD5')dnl TRUST_AUTH_MECH(`PLAIN LOGIN CRAM-MD5 DIGEST-MD5')dnl define(`confAUTH_OPTIONS',`p,y')dnl FEATURE(limited_masquerade)dnl EXPOSED_USER_FILE(`/etc/mail/exposed-users')dnl FEATURE(`ratecontrol')dnl FEATURE(`conncontrol')dnl FEATURE(local_procmail)dnl MAILER(local)dnl MAILER(smtp)dnl MAILER(procmail)dnl LOCAL_RULESETS HMessage-Id: $>CheckMessageId SCheckMessageId R< $+ @ $+ > $@ OK R$* $#error $: 553 Header Error -----------------------------------------------------------
