Pear mail did not issue mail/expn/vrfy/etrn during connection to MTA

[Rock Villa]

If I use Thunderbird as the mail client from the Windows computer, I can receive no problem, but when I send it continually asks for the password, once I give up entering it I see this error in mail log. I am getting this error message in my cobalt logs for one of my clients that hosts their e-mail on my raq 4. No one else is getting this problem and all mail is going out for everyone else on the site. When i try to telnet to exchange server on port 25 it takes a long time.

[Shell]

Is their site set to be able to relay emails on the server? Regarding "did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA, I will suggest you to check on your sendmail.mc is there FEATURE(`dnsbl', `relays.ordb.org', `Rejected - see http://ordb.org/')dnl line. I think there would be no help possible without knowing more about your config file(s)...(no need to be real data)If it so please make it dnl for the same that means comment it. Then recompile your sendmail.mc and then restart your sendmail. You will not have this problem and also you will get all mails which was not able to receive earlier.

[Adley]

They are a virtual site on the cobalt. I use the pop-b4 smtp to allow relaying. Their mx/dns is setup correctly. MX points to mail.domain.com, mail.domain.com points to cobalt IP. You should not allow relay - spammers can catch this security hole and send spam emails spoofing your domain name in the from address.

[Alejandro]

The error you give gives an indication that the wrong version of RT is installed. or it Could be because their mail client did not follow through the normal SMTP process? Because if all your other users are OK and you set the thing up similiar to other accounts it should not have a problem.The 2.6.9 kernel junk is what CentOS 4.x runs. I don't know how the RT was installed, but it looks odd based on the info so far.