Its a much more sensitive (strict) version of MAILFROM. Weighted less than MAILFROM, it sees things that otherwise get through. I forget what it is, so Scott would have to explain what that actually is.
The standard MAILFROM test will check to see if the domain on the return address has either an MX or A record in DNS. So if an E-mail fails the MAILFROM test, the return address can't receive mail.
The strict version (defined with the "mailfromstrict" test type) only checks for the MX record. Although a domain with an A record can receive mail (if there is a mailserver at the IP corresponding to the A record for the domain), it isn't advertising that it allows E-mail. It will have more false positives -- people seem to think there isn't a problem with having no MX record, since the RFCs do require mailservers to attempt to send to the A record if there is no MX record.
-Scott
--- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)]
--- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.
