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Originally Posted by robrankin Not sure if this is the same issue I've seen with Outlook, but it seems Outlook 2003 doesn't like SMTP+TLS on port 25. I've only gotten Outlook to work with "old style" SSL port 465, that is SSL connection is negotiated first, then the SMTP session is started which is the reverse of SMTP+TLS on port 25.
You can enable this in postfix by enabling smtps in master.cf. Perhaps Zimbra should enable that in the postfix config by default?
Hope it helps... |
Hello Rob,
Thank-you for your tip. However, I have confirmed that it is not only Outlook that is not able to send email. I tried sending with Thunderbird and Evolution, too. No client succeeds in sending email through this one domain. However, I am able to send email from other two domains.
I have also tried: unchecking "TLS authentication only" in the Zimbra Admin UI(Configuration->Servers->sub.domain1.com), restarted Zimbra and send email. This, too, didn't work.
Sincerely,
Chintan Zaveri.