You have sent 500 AOL domain emails to your ISP mail
server and were being relayed, but due to;
concurrent connection--AOL mail server have
reject some or all of them because AOL
does not allow your ISP mail server or your PCs mail server to exceed sending
the maximum number of emails and/or by time limit imposed per connection.
See: Valid AOL, Yahoo, Hotmail
etc., yet my
Undeliverable emails do not
necessarily means that they are invalid.
Try submitting a few messages to that
domain at a time and keep increasing the number until you find the maximum
quantity or time limit--accepted by the server, or avoid broadcasting emails
during "peak" hours or do not group all your mails with the same email domain
address under a single list.
For example: Don't
group all your email addresses; AOL's, Hotmail, Yahoomail, etc., if the your
mail broadcasting program automatically does that for you and nothing can be
done about it, then you should look for another program like
mailsbroadcast--our program send
out email addresses randomly, therefore avoid spamming any single mail server.
If you are using your own mail server and mails are rejected with can't be
delivered with notification like; server-time-out.
Mail Server FAQs
I recommend it.
The easies way to
email spam, virus getting
into your PC
Art of War -
without strategy of
warfare, invite defeat."