The mailing list for listmasters using Sympa

[David Verdin <address@concealed>]

Some antispam engine will reject silently to prevent backscattering.
Could it be related?
If your message is some kind of HTML newsletter, it can easily be tagged as spam.

Also the number of outgoing sessiopns in postfix wil not correspond to the number of mail receipients because Sympa groups receipients by sessions, exept if you set the VERP rate to 100%.

Le 25/09/2015 12:59, Josemari Amatriain Martínez a écrit :

On Fri, 25 Sep 2015 10:04:08 +0000
"Steve Shipway" (via sympa-users Mailing List) <address@concealed> wrote:

A message was not sent to all subscribers of a list (lista-pdi). The list has 1200 subscribers (taken 

>from a source, from LDAP server) and only 800 emails were sent.

The logs seem to show the message arrive, confirm 1207 messages to send, spawn a second bulk process to handle the load, all messages are sent after 10 seconds and after idle timeout the bulk dies.

Everything appears to be normal from these logs.  What makes you think only 800 were sent?

Can you check your sendmail/postfix logs (whichever you use) and see if anything is going on there?  Possibly you have some rate limiting, or thread limiting, and some messages are being held up or rejected?

I don't think that a synch_include during a message delivery could cause users to disappear, unless for some reason the LDAP query returned less than the total number of people and removed some, but errors in the LDAP cause no synch to occur.  The two logs both say only 1 user was updated though.

Sorry. I forgot to tell you, I checked the postfix logs to count the
number of mails sent. I did this, because I received multiple complaints.
Some subscribers received the mail and others didn't.

The mails were not rejected/held, lost recipients didn't appear in the log file either. 
It was August and there were not many sendings on that date/time and server. 
Unfortunately the complaints reached me one month later, yesterday. The list owner was on vacation.

I discarded the hypothesis of a LDAP failure because both updates return the same number of subscribers, 1026.
I think both updates were right. 

Thanks in adavnce.

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David Verdin Études et projets applicatifs
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