A caution on MobileMe outbound email domain filtering

Dec 05, '08 07:30:04AM

Contributed by: Anonymous

This is a hint regarding a serious problem for MobileMe users: Outgoing mail via smtp.me.com may not actually be sent if it is sent to certain domains. If a message is caught in this domain filter, it is silently dropped without notification to the user. None of the recipients of the message will receive it, even if they are not in the filtered domain. This problem occurs with mail sent through Apple's Mail app, on the iPhone or on Mac computers. It does not happen when sending via the MobileMe webmail interface. So far, only spamcop.net has been identified as a domain filtered by smtp.me.com, but there may be others.

This problem is testable and repeatable as of this writing; you can test it yourself as follows. On a Mac or iPhone, use Mail to create a new message using your MobileMe account. In the To field, put support@spamcop.net, in the CC field, enter a valid personal email address, and in the Subject field, put test, then send the message. You will not receive the cc message, and you will not receive an acknowledgment from spamcop.net. Try sending from a non MobileMe account; you will receive both very quickly.

More discussion of the problem can be found in this thread on Apple's discussions site. This has been happening for months, apparently since the transition from mac.com. The problem has been reported to Apple, and apparently some in frontline support are aware of it, but others are not. In the meantime, all MobileMe users should be aware that their outgoing mail is apparently filtered by domain. If you're sending to a spamcop.net address, be aware that the mail will not be sent to any recipient, nor will you be notified of the problem.

[robg adds: I can confirm this is still happening as of this morning.]

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