295816Re: duplicate email issue with list
- Oct 7, 2013--On Thursday, September 26, 2013 4:38 PM -0400 Wietse Venema
> Quanah Gibson-Mount:Ok, will do.
>> One of our customers has an interesting setup where they did the
>> a) Created 50 users
>> b) Added a secondary address for the 50 users to an external server with
>> 50 users (So any email sent to user@server also gets copied to
>> c) Created a list with the 50 users as members. Lists are just a simple
>> ldap member: of list.
>> If an email is sent to the list:
>> The 50 users on the server each get a copy
>> The 50 users on the second server get two copies
>> I've verified I can recreate this issue with a list of 30 users with the
>> same configuration. I don't see it with a list of 25 users. I'm sure
>> there's a postconf key that would control this, but I haven't had any
>> luck tracking it down. Thoughts welcome. ;)
> 1) Look at the maillog files of primary and secondary server, with
> particular attention to the nrcpt and orig_to fields.
> 2) 50 Is a magical number; it is the default_destination_recipient_limitDefinitely not this, the first thing I tried was changing this value from
> (the number of recipients per SMTP mail transaction). When a queue
> file has more than 50 SMTP recipients, these will be delivered in
> more than one mail transaction.
50 to 300. ;)
> 3) Postfix tries to preserve the x-original-to address by default,Ok, thanks.
> meaning it will not eliminate duplicate recipients of the same
> message that differ in the x-original-to address.
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