Temporary error: 452 Too many recipients. Will try the same exchanger later. ...keep getting that message when trying to send an email via distribution list, when it gets to the Hotmail and Yahoo members. Probalby ~50 members each with those email addresses. ???

...no thoughts on this?

It sounds like an anti-spam feature. One mailing with multiple recipients. You can try breaking your list down to multiple mailings, with those addresses. I have no idea what their max is so it would be hit and miss.

...there's not that many in my list...

If ~50 email addresses is too many for Yahoo or Hotmail, how in the world does someone like, say, Amazon or eBay manage to send emails to all their subscribers?

They probably use a list server, where each message is sent individually instead of one message with multiple recipients. For myself, I used a script to access this sites user base to weed out many invalid email addresses that were registered before I took over the site. Even those messages Yahoo put in a holding cue before being delivered, something like a gray listing.

...huh. Is there a list server that anyone here uses with Argo?

The pro version used to have a list server, but as of now, that has not carried over to the .NET version, that I am aware of.

For the record, I was just informed by my customer that they found a solution to this problem - they started using Gmail. Apparently Gmail must use list serving functionality, because all their recipients got the email.

I checked with Archie and he informed me that the Pro version did not have list serving functionality. However, it would seem to be an important feature to add...lest we all start losing customers.