Ok, we have AT&T T-1 with e-mail hosted by Network Solutions. Receiving e-mail up to 10 Mb is not a problem however when sending e-mail over approx. 1.5 mb we get the response:
Your message did not reach some or all of the intended recipients.
Subject: FW: Test for 5 Mb File - actually 3 files totaling 4.63
Sent: 8/27/2004 9:44 AM
The following recipient(s) could not be reached:
XXX XXXXXXXXXX (E-mail) on 8/27/2004 9:47 AM
No transport provider was available for delivery to this recipient.
Now we have checked with AT&T and there are no blocks on line, we have checked with Network Solutions and their send limit is 5 MB, receive is 10.
There are no options for size to configure within IIS for Virtual SMTP and we are not running exchange internal.