Trying to send an email to a client, with a PDF attachment. I can send a regular email fine, but the PDF attached is not. This used to work. I am curious, is this being blocked from my end or the clients? I think clients because it says postini and I am running Exchange 2007.
Your message wasn't delivered because of security policies. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator.
The following organization rejected your message: Postini.
Postini #550 5.7.1 Message rejected as spam by Content Filtering. ##
PostIni is a service that filters SPAM/viruses, etc. (I use it for my organization). The way it works is my organization's incoming mail server is defined as one of the PostIni servers - their server in turn will reject, silently drop, or deliver the message to my server - so you wouldn't expect to see the actual recipient server address in the headers.
You should advise the recipient to put you on their "allow list"
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that's what i assumed. but on my message headers i dont see any communication between the exchange server of mine and the clients mail, like i normally do when i get other errors or what not.
That's because your mail is being rejected by the PostIni server before your message is even attempted to be delivered to his e-mail server (that's how PostIni works). So the message headers should reflect communication between your server and the PostIni server.
Sorry, I mis-spoke - since PostIni isn't accepting the message they won't have modified the message at all (including headers). So, the message headers would likely indicate the message has been handled only by your server, but the non-delivery report will indicate rejection by PostIni.
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