I am able to change the SMTP banner:
in /opt/zimbra/postfix/conf/main.cf, I changed:
smtpd_banner = $myhostname ESMTP $mail_name
I changed the Tomcat servername/number/build date so we don't give out that info, by editing
But I can't figure out where to change the IMAP banner for connections on port 143. I'm using IMAP with SSL, but I don't think I'm using the Perdition IMAP proxy.
To be clear, I'd like to change this:
telnet server.domain.com 143...
* OK server.domain.com Zimbra IMAP4rev1 service ready
David Di Gioia