Mailer setting

[vasacampana]

Could you clarify to me mailer setting parameters and behaviour.
An example:
As the (external) mail server has timeout limitations, I nedd to split my mass mail job into "sub-jobs", no more than 300 mails/job (over 1500 mails to be sent).
Le me know if is it correct at this purpose, and working, to set:
- Mailer Batch Limit   = 300
- Mailer Throttle Time= ?
- Mailer Job Size = 1000
- Mailer CRON job limit = 1

If I well understand this setting
- posts the first 300 mails, then
- launches the following 300 mails, and so on until all messages have been sent.

Thank you.

[David Hepper]

A late reply but the answer may be useful to someone:

- Mailer Batch Limit is not explained well in the field help. It is the number of mails sent by each run of Cron. Therefore if Cron runs more than once per hour you need to reduce this value to send only a proportion of the hourly limit. Many hosting companies set the hourly limit to 500. But if you send a batch plus a few non-batch messages set this to 470 to avoid seeing warnings in bounces such as:

"Domain mydomain.org.uk has exceeded the max emails per hour (504/500(100%)) allowed.  Message will be reattempted later"

(In this case the hosting co. only delays the message instead of throwing it away but the warnings are annoying.)

- Mailer Throttle Time is the time to wait in microseconds between sending messages. Therefore the values here are huge, e.g. 7400000 = (1 every 7.4 seconds) and sets the max rate of outgoing emails to 486 per hour, just safely under a 500 limit.

David