Mark Sapiro wrote:
o In the sendmail logs, I get (just do the normal replacements for the words "at" and "dot"):
Oct 23 21:26:08 cranium sm-mta[13718]: i9O1Q8EF013718: from=<test-bounces+rich dot west=wesmo dot [EMAIL PROTECTED] dot wesmo dot com>, size=1421, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1]
The above envelope from is VERP like.
<..snip..> Weird.. I never had to alter [the value of SMTP_MAX_SESSIONS_PER_CONNECTION] before... Will that have a negative impact on things in any way?!
Yes, but not too much. The VERP like address above is used for enhanced
bounce detection and is controlled by VERP_DELIVERY_INTERVAL and other
options.
I went through the Defaults.py file and read up on VERP to get better acquainted. :)
<..snip..> This is the big performance hit with VERP like envelope from because the message text must be repeated for each recipient as opposed to non-personalized, non-VERP which may have just one MAIL FROM:, a bunch of RCPT TO: and one DATA.
In your case, setting SMTP_MAX_SESSIONS_PER_CONNECTION = 1 takes the above SMTP session with multiple transactions and puts QUIT, get disconnected, reconnect, EHLO between each message. This adds some impact, but not alot compared to the impact of doing the VERP like addressing at all.<..snip..> It seems like there is some problem with your MTA accepting multiple transactions per session or possibly with the way Mailman sends them.
Possibly.. I went looking through my mm_cfg.py and, at the end, the following VERP options had been enabled:
VERP_PASSWORD_REMINDERS = 1
VERP_PERSONALIZED_DELIVERIES = 1
VERP_DELIVERY_INTERVAL = 1
VERP_CONFIRMATIONS = 1
Basically, everything was turned on. For sanity sake with regards to the testing, I set the value for SMTP_MAX_SESSIONS_PER_CONNECTION back to 0 in the Defaults.py file (since I really should have set it in mm_cfg.py anyhow), commented out the above values in the mm_cfg.py, recompiled, restarted mailman, and shot off a test email.
It came through with no problems.
So, I guess it is a toss up as to having VERP enabled with one SMTP connection per transaction or disabling VERP and setting the SMTP max sessions per connection to 0 (unlimited)...
Recommendations/suggestions? :)
-Rich
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