Re: How big a mailing list?

On Tue, 6 Sep 2005, Peter P. Benac wrote:
> If you are using sendmail set the TOBUFSIZ to 1024 (< 25 addresses). It's
> default is 2048 (> 25 addresses)  The big mail handlers like Yahoo will not
> allow more then 25 addresses per envelop or more then 4 connections at the
> same time.  Most important is to keep your list clean. If you get a large
> number of rejects the big guys will throttle you back to far less then 4
> connection and 25 addresses.
>
> > But you can run into problems with that practice when a domain has 
> > limits on recipients per message (AOL, Yahoo, etc).
> > 
> > 
> > At 05:37 PM 9/5/05, Daniel Liston wrote:
> > 
> > >You can improve performance of delivery by keeping your list 
> > >membership file sorted by domain.  This way, when your MTA receives a 
> > >distribution request, it can optimize by sending to all the uses of 
> > >each domain in a single connection.
> 
> What is the best way around this then with Majordomo? We use the program
> bulk_mailer to group domains together in SMTP envelopes, but larger lists
> with lots of Yahoo addresses for example get rejected due to too many
> recipients. We tried adjusting sendmail max messages per envelope settings,
> but these seem to just reject entirely and not break up the envelope...

This would require recompiling sendmail it seems. And setting 
MaxRecipientsPerMessage in sendmail to a low value seems to reject 
bulk_mailer submissions with large numbers of addresses for one domain. I 
am trying to find a method to either tweak bulk_mailer or an easier 
setting for sendmail without having to recompile sendmail. I guess with 
newer versions of sendmail you can use QUEUE_GROUPS, but older versions 
seem to be out of luck...

Rob