I spoke with a few people last night, and others were having problems with Hotmail. I checked hotmail from my bellsouth.net account, sent 12 emails, and only 4 went through till 8am this morning when I got the rest. Could have been something with the network here in Florida. Who knows.
That's the normal reason why you'll see a remote mailserver drop the TCP/IP connection. They were probably overloaded (perhaps a couple of their servers were down, and the rest had to handle a higher volume of mail than normal). It's rare for a mailserver to drop the TCP/IP connection intentionally, as it wastes a lot of bandwidth (for E-mail, at least).
Could you speak more about this Negative ACL?
"ACL" normally standard for "Access Control List", which in this case is a list of IPs that a mailserver doesn't want mail from. It is usually used in extreme cases (such as a mailbombing). There's also someone who has created a list of mailservers using DSL/cable connections that also calls the list ACL, but that's a different story.
We are a moving business, and we have a program that sends about 12 thousand emails every 2 days. This is not spam, its a reminder for our customers. We even provide a link in case they don't want the program reminders. Would hotmail consider me a spammer?
It's possible that they might, if a significant percentage of your customers are on Hotmail. Anyone sending out large quantities of E-mail is likely to have a lot of them blocked (for example, if one person incorrectly reports you to Spamcop, you'll get listed there, and some people block E-mail based on the results of a single spam test). Just be careful about what you do (make the unsubscribe link clear, mention at the top of the E-mail that you are only sending to customers of yours, don't have a spam-like E-mail ("BUY NOW AND GET A 10% DISCOUNT!!!", for example).
-Scott
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