Is forwarding mail from other accounts well-supported?
Hi -
The use case I'm evaluating MailRoute for is to provide spam control for accounts that I don't have control over and offer poor spam filtering.
Example:
I have a couple accounts that I use for open source software contributions. These are organizational accounts for which I don't control the servers, and the persons responsible have little interest in configuring a more robust anti-spam solution.
So, using either .procmailrc or .forward, I'm forwarding messages to my personal domain, which passes through Mailroute.
I understand that such mails won't benefit from greylisting, but will the remainder of the infrastructure be effective?
Are there headers that I could add/munge to ensure that Mailroute is considering the original sender rather than my organizational accounts when evaluating, for example, blacklists/whitelists?
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Hi William-
If you're forwarding email from another account, you're right - it won't benefit from greylisting. And it won't benefit from our adaptive blacklisting system either. If it's coming from a legitimate mailserver, that's going to give it some points in the "not-spam" column.
But the rest of our content filtering will work the same. Your overall effectiveness will be decreased, and you'll have more false-negatives, but I don't see that there would be any difference in false-positives.
If you want black and whitelists to continue to work, rather than forwarding the mail, you actually want to "redirect" it - you need to keep the "From:" header the same, at the very least. Our white and blacklisting checks both the SMTP envelope and the From header against the lists, so if you can keep one or both of those intact in your redirection of the email, then those features will continue to work.
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