It seems the delay in submitting message is due to reverse lookup of my intranet ip address which is not resolvable. I was able to eliminate the delay by setting TCPDOPTS to -nodnslookup and -noidentlookup in esmtpd. However, I don't want to disable it globally and would prefer to set these options just for my local subnet and specific ip addresses. It is not clear from the documentation whether I can do this selectively in the smtpaccess file. If so, would the syntax be:
Thanks in advance for your clarification.
Sam Varshavchik wrote:
Aldisa Admin writes:
Thank you for your advice gentlemen.
I removed the CRAM authentication method from esmtpd. This has
eliminated the authentication error from the log file.
However, there is still a substantial delay in submitting messages to
the server from Thunderbird. For example, it takes less than one
second to submit a message to Gmail remote SMTP. Gmail uses port 587
for remote message submission with authentication. I have tried to
submit to submit to Courier on 587 and 25, and am experiencing a delay
of anywhere from 5 to 10 seconds for the server to accept the message.