Greetings to the forum/server admins.

I just discovered that my spam filter (spamassassin) classifies the reply notification mails as spam -- and its arguments even seem to be reasonable:

Code:
Content analysis details:   (5.2 points, 5.0 required)

 pts rule name              description
---- ---------------------- --------------------------------------------------
 1.8 FORGED_YAHOO_RCVD      'From' yahoo.com does not match 'Received' headers
 0.0 BAYES_50               BODY: Bayesian spam probability is 40 to 60%
                            [score: 0.5070]
 0.2 DNS_FROM_RFC_ABUSE     RBL: Envelope sender in abuse.rfc-ignorant.org
 1.4 DNS_FROM_RFC_WHOIS     RBL: Envelope sender in whois.rfc-ignorant.org
 1.7 DNS_FROM_RFC_POST      RBL: Envelope sender in
                            postmaster.rfc-ignorant.org
The bayesian spam probability is most likely due to the "unsubscribe" links at the bottom, but it's basically harmless anyway at that probability range.

I'm not sure what you can do about the blacklist entries (the last three in the list), but it might be a good idea to at least ask there why you're listed. http://rfc-ignorant.org/ contains some info and a lookup thingy. e-budo.com doesn't seem to be listed, so it's maybe your hosting provider's domain. But you'll know that better than me

But the forged "From:" address should be simple to fix -- and that alone will push the rating reasonably far under the threshold.