Thank you very much, you have been extremely helpful.

First I called my internet provider about the following problem ... they said they see no errors on their side and that nothing was caught in their filters and that it must be on my side. They helped me turn off port 25 but that caused Pegasus to crash and not be able to open until I found and deleted the corrupt .CNM file causing the crash.

I had Pegasus 4.2 and just upgraded to 4.52 and had the following problem with both that's why I upgraded thinking it might solve the problem but it didn't.

When sending the Distribution list [.PML file] with 330 email addresses properly formatted, after a few minutes it would return the following message.

Delivery has failed on the enclosed

message for the following reasons reported either by the mail

delivery system on the mail relay host or by the local TCP/IP

transport module:

552 too many recipients
  

552 too many recipients
  

552 too many recipients < this repeats 200 x’s
  

554 Too many recipients < then ends with this

--------------------------------------------------------

Any ideas on how to solve the problem?

  

552 too many recipients
  

552 too many recipients
  

552 too many recipients < this repeats 200 x’s
  

554 Too many recipients < then ends with this

Your

original mail message follows:

--------------------------------------------------------

Any ideas on how to solve the problem?

Not sure how you will solve this but the SMTP host you are using has set a limit on the number of addresses you can have in a single message.  Probably the limit is around 50.  Not at all sure why your ISP did not tell you that when you talked to them.

Thanks ... problem solved ... got a question ...

My server will allow emails to 100 recipients at a time no more then 500 per hour and 5000 per day. Are there settings with Pegasus to put a thousand or so emails in one distribution list and then have it mailed according to the SMTP protocol automatically? or do I have to break them up in packets of 100 and send them one at a time accordingly?

My server will allow emails to 100 recipients at a time no more then 500

per hour and 5000 per day. Are there settings with Pegasus to put a

thousand or so emails in one distribution list and then have it mailed

according to the SMTP protocol automatically? or do I have to break them

up in packets of 100 and send them one at a time accordingly?

WinPMail (and Mercury)  do not understand throttling so you'll have to do this through a scheduler on your own.  I find the easiest way to do this is using WinPMail with Mercury and then use a split queue.  WinPMail put the messages into a queue directory in glue header format and then your scheduler will move them into the actual queue making sure that no mare than are allowed are processed at one time.

There are other ways to do this but all of them involve a scheduler and some programming effort to ensure the mail is properly handled.

That said a Mercury mailing list using VERP-based error handling puts out a message with a single address and that would make it a lot easier to meet the limits. 

You can also just use WinPMail mail merge which will create a tailored message for each e-mail address and this would also be easier to keep within the 500 per hour limit.