I would seek the services of a 3rd party mass mailer who does this for a living.  We have both emergency and several informational email alerts for the different campuses which totals about 110K email subscribers as well as tweets and text messages for those who prefer those methods.

  Bob

> 
> On Tue, 16 Sep 2014 22:43:14 -0000, Brett Watts said:
> 
>  I am seeing long delays when a message is either send to a mailing
>  list with a lot of subscribers (1000+) and when there is a large
>  attachment (5MBs +) on a message.
> 
>  I have concerned Administrators that are sending out important
>  emergency messages and they are arriving after the event that is
>  being warned about.
 

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