View Full Version : error #4.5.3 too many recipients

09-05-2010, 08:17 PM
I have been getting this on business and home computers for about two weeks now.
I have phoned ISP providers (3) not their problem
I have changed software, (thunderbird, outlook, netscape)

I have looked in google.
Too confusing and no real answers

Does someone have a simple fix for this problem.


09-05-2010, 08:27 PM
Well, first question is, how many names are on the email going to that server at the other end.?

They could have there email SMTP server set at a max number of say 10 or 50 or 100 as the number of addresses that it will allow or handle.

Have you tried sending to the other person or company in smaller blocks of names.?

10-05-2010, 10:01 AM
Or just maybe you have a virus which is mass mailing from both your home and business PCs.

If you are genuinely trying to send emails to a large number of recipients, you could try using an online message board to do the distribution (but check they don't harvest/spam email addresses you supply).