I have a courier server behind a campus firewall and there are several
other mail servers (non courier) in the network. A sendmail mail-relay
is the only permitted smtp port outbound.
Courier can send mail within the campuse and recieve mails from
everywhere (internal and external) but it can not deliver to external
The failure notice is: Connection refused
the mail relay has the following entry:
Aug 23 10:38:08 mail-relay sendmail: STARTTLS=client,
relay=mycourier.domain.com , version=TLSv1/SSLv3, verify=FAIL,
I created the esmtproutes and even the esmtpauthclient files with the
address of the mail relay but neither helped.
What else should I do? Thanks.