We have a voicemail system that will send users their voicemail by email. Trouble is that Exchange will categorize most of these messages as "junk email" and put them in that folder. The only smtp traffic we receive from the voicemail system at 10.10.1.41 is this type of message. Is there a way to flag ANYTHING from this particular host as safe? The "from" address is always different. It doesn't look like an email address. instead, it is formatted like this: Phone_1112223333 where the numbers are the caller ID for the person who left the message. There is no @ sign. All messages contain a WAV attachment.
Thanks to anyone who can give me step-by-step instructions to configure Exchange to allow all these messages.