I have sendmail MTA and I use pear:Mail class to send mails through remote sendmail server. Everything was fine till yesterday. Probably nothing changes was made in configs.
At maillog I can see:
May 6 12:58:55 xxx sendmail: STARTTLS=server, relay=hostxxxx.static.xx.xx.pl [85.x.x.x], version=TLSv1/SSLv3, verify=NO, cipher=DHE-RSA-AES256-SHA, bits=256/256 May 6 12:58:56 xxx sendmail: o46AwtqE025903: hostxxxx.static.xx.xx.pl [85.x.x.x] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA2
and in /var/log/messages:
May 6 13:00:17 lilia sendmail: realm changed: authentication aborted
I use ldap to authenticate users but I used the same script to check mailing on another server and it works there good, only this server behave weird. Packets are delivered to sendmail server I can see it in tcpdump, but there is smaller packets than on other server which sends emails.
Could you tell me how can I check what is wrong with that?