by Code Crafters » Mon Jun 03, 2013 7:29 pm
You shouldn't get bounces for too many recipients really. Mailing lists separate out and send emails to each domain separately. However, there's no setting to reduce the number sent on a single email to one domain in mailing lists. However, you can reduce the max recipients per transaction in outgoing mails so that mails to a single domain are split down into multiple to avoid this problem. Obviously this will slow down the sending rate of outgoing mails a little but as long as you don't have massive outgoing mail then you'll be fine.