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Date:      Sat, 02 Dec 2006 08:58:55 -0500
From:      "Worth Bishop" <wbishop@twosensemedia.com>
To:        freebsd-questions@freebsd.org
Subject:   FreeBSD 6.1 throttling sendmail?
Message-ID:  <web-2521640@twosensemedia.com>

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After poring over sendmail manuals, docs, readme's and 
Googling extensively have not found the answer to this 
question. What configuration settings regulate the 
outgoing e-mail volume?

Have recently upgraded from FreeBSD 4.3 to 6.1 (i.e., did 
new install of 6.1 on clean disk, installed current 
versions of applications and moved files - on same server 
as before, same processors/memory, etc.). Installed 
Sendmail 8.13 using standard sendmail.cf & FreeBSD.cf in 
/etc/mail.

Have a PostgreSQL database of 20k+ opt-in subscribers to a 
newsletter. When I invoke the sending routine, sendmail 
immediately spawns 20 - 30 processes (all I can see via 
"top"), quickly sends out 150 - 160 e-mails (via 
/var/spool/mqueue) then no more new processes are spawned 
and the system returns to a listening state. No error 
message in /var/log/messages, no clues in 
/var/log/maillog, nothing in the PostgreSQL logfile to 
indicate why the e-mails stopped sending.

FreeBSD's sysctl shows more than ample system resources 
(mbufs, files, etc). Netstat -m reveals no denied 
requests. Is there another FreeBSD mechanism at play? A 
sendmail configuration setting I can tweak to ensure all 
e-mails are sent? Any other ideas on a cause of this 
behavior?

Have x-posted to the comp.mail.sendmail group with no 
replies yet; sure would appreciate any help.

Thanks!



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