5
Is it possible to select a sub-group of users as email recipients, then later select the next sub-group, send, and repeat the process until everyone has been a recipient?
To overcome the limitation of my mail server (250 emails per hour per account to discourage spamming) for a custom PHP web site I designed an email Queue that took a list of receipients and divided it into smaller groups. Then I created a Cron to check the queue and send out the next email to its group every hour.
Perhaps a future XOOPS module or core addition could do something similar to overcome such limitations, whether they be due to mail server limits or memory limits...