Outlook 2003 mass e-mail errors "too many recipients"

[Japetto12]

hello.. I am attempting to send an email to about 450 clients. I keep getting a message similar to this: "452 too many recipients" and the emails get returned. I try sending like 30 at a time and sometimes most will go through but
I'll still get the same message on some emails: "452 too many recipients" even if I send to just 30 people. Any information on how to resolve this issue and/or what's causing it would be greatly appreciated. thank you!

 

[Griffyn]

Anti-spam rules will cause this. It's probably being generated by your ISP's SMTP server.

 

[NoCalAdmin]

the easiest thing to do is create a distribution list with your recipients in it. That way your Outlook is only addressing I name until it leaves your Exchange Server.

I've ran into your same issue and this worked.