R. Scott Perry wrote:
One of my users is trying to send an email (through Imail) to a valid email address, but it is getting returned with the error Unknown User.
I went to DSNStuff.com and checked that the email address is valid. The email address is valid, but the domain failed a few tests, but since I'm a newb I'm not really sure if these could be the problem or not.
Thanks for you help.
Unknown user: [EMAIL PROTECTED]
That really means "IMail couldn't deliver the E-mail for one of many reasons; check the log file for more information."
Alternatively, you can use our free BounceFinder program (at http://www.declude.com/tools ), which will automatically let you know why the mail is bouncing.
You're listed in DSBL, so I'm guessing the problem is that you are an open relay. IMail's SMTP Security options have a number of relaying choices. Of them, only 2 can be used safely (the rest cause you to be an open relay). The two safe options are "Relay for Addresses" and "No Mail Relay".
If you use IMail's "Relay for addresses", you would enter a list of "safe" IP addresses that your users may come from; anyone not coming from those safe IPs would need to use SMTP AUTH. If you use "No mail relay", everyone must use SMTP AUTH to relay mail. Note that relay settings apply only to outgoing E-mail, so no matter what your settings are, your users will still be able to get mail.
-Scott
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