Hi,

We had installed qmail with clamav , spamassassin & simscan. The mails are
sending and receiving fine in webmail. But when we try to send mails in outlook means the mail is not going to sent items. Its remaining in outbox but
the mails are delivering fine. Whenever i click send/receive button in outlook
the mails are sending every time.

Error Message from the outlook.

The SMTP server returned an error. Subject 'test', Account: 'qmail.abtinfo.com', Server: 'qmail.abtinfo.com', Protocol: SMTP, Server Response: 'simscan:[25194]:RELAYCLIENT:0.0486s:-:118.91.233.14ostmaster@qmail.abtinfo.com:abtonline@gmail.com', Port: 25, Secure(SSL): No, Error Number: 0x800CCC60


When i deactivate simscan the mails are working without any issues in outlook.

How to fix it?

Anybody help us?

Regards,
ABT

0x800CCC60 basically means "huh?" as in LookOut not understanding what the MTA returns. I wonder if testing other OSS MUA's like Thunderbird, Evolution, mutt, (al)pine or others handle whatever the MTA returns fine.