How to limit Bandwidth for Sendmail?

Hello,

I need to find a way to limit the bandwith usage for sendmail from one of my servers on my network.

The problem is that when i send a newsletter to my list, just the first threads can connect to the database to get the emails list. (The database is on another server).
In a few minutes i get all of my bandwith used by sendmail and the last threads cannot connect to the database, so the newsletter is never sent completely.

How can i limit the usage of the bandwith just for sendmail from that server?

Please, i'll appreciate your help

Thank you in advance

 

 

 

 

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