Clarification

By Timothy R Butler | Posted at 4:19 PM

Here are some clarifications concerning my re-implementation of DUL blocking.

Will I still be able to send mail to ServerForest addresses?
Yes. Just to be clear, when I re-enable the dynamic users list (DUL), it will not block users from e-mailing me or anyone else on ServerForest, even if they have a dynamic address, so long as you send your messages through a normal SMTP server, such as the one from your ISP, web host, etc. The only people who will have problems are people who run their own SMTP server on their own computer that is connected to the Internet dynamically. If you don't know what that means, I can virtually assure you that you aren't doing it and this won't impact you at all. :-)

Who runs an SMTP server from a dynamic address?
Almost all SMTP traffic coming from dynamic addresses is SMTP traffic caused by worms and similar malicious programs. Typically, this means they are either sending copies of themselves or working as zombies to send spam. Because it is likely that virtually no legitimate traffic will be sent this way, many hosts block DUL SMTP servers traffic, quite likely, yours already does (unless you are using my services, and then yours will shortly).

Tags: Comp/Tech

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