Derrick T. Woolworth writes:
Hi all,
I have an installation of Courier that is a "bit" old, and while talking
to serveral different mail servers, I'm getting messages like:
454 TLS not available
and then the message is deferred, forever.
I have looked at the settings in esmtp-ssl and checked to make sure the
system's certificates are readable by Courier, among many other things,
but still I can't stop this message. I have turned off TLS completely -
assuming that the mail server its talking to would allow a non-TLS message
to be delivered.
Also, I have telneted on port 25 from this mail server to the target mail
server and had no issue in delivering e-mail to the intended recipient.
Does anyone have experience with this error or have any advice on where I
should begin to look?
Look at the moron you're sending mail to. His mail server claims support
for encrypted connection, yet when Courier calls his bluff, it vomits all
over itself. The error message you're seeing is the remote server croaking
after it's ordered to begin encryption.