On 11/30/2009 3:32 PM, chucker8 wrote:
Hello, I'm looking at spamassassin for our compnay's spam solution. We receive emails from u...@theirdomain.com, where the domain in correct but the user would be for instance, Viagra, which does not exist. We needthe spam software to realize that this user does not exist and register the email as spam. Is there any way to do this with SpamAssassin?
In general... no. Unless the other company is willing to give you access to their internal list of valid email accounts.
While the SMTP RFCs do support the "VRFY" command (which would technically let you check whether the "FROM" address exists), probably 99% of all servers have disabled that command to prevent spammers from abusing it to validate their mailing lists. (See RFC 5321 section 3.5.2 and 7.3.)
