On May 25, 2012, at 02:25, Wietse Venema wrote: > Dan Lists: >> I am looking to switch one or more of my blacklists to run from >> postscreen. [...] >> I do not see any way to set the response text when using postscreen. >> I see postscreen_dnsbl_reply_map, but it looks like that just changes >> the domain (ie zen.local to zen.spamhaus.org) not the reply text. Is >> there any way to set the postscreen DNSBL reply message? > > I second Rob's comments: the purpose of postscreen is to block > spambots. Don't use it to block mail from sites that (also) send > non-spam mail, and don't use it on a submission server. > > Other than the postscreen_reject_footer feature, there is no option > to customize responses. This is likely to stay that way, given that > postscreen is not meant to block mail from sources that (also) send > legitimate email.
Also, I would not bother optimizing something that isn't going to make a measurable difference in a meaningful metric. Spamhaus is so close to universal that if someone does get listed, they will be seeing rejections across the board. Will they actually read the extensive explanation, and save you time? In our experience, the overwhelming majority of users does not read the actual error message. Or only the first part. If it's even visible to them, and not buried in a custom bounce message generated by their local MTA, trying to be helpful. Exchange does this, for example, and Mimecast will suggest that the 'Recipient email address is possibly incorrect' if you reject after RCPT with a '550 5.7.1'. And that's not counting the ones that will cut off the response after a certain number of characters. We haven't seen complaints with regard to Spamhaus in years. And the complaints we do get (DNS/SPF errors, for example) tend to arrive via the client, who got a message from the original sender's Gmail/Hotmail account. Even if the error message specifically requests that they contact 'abuse' at 'dtnx.net'. Beware of premature optimization. I hear it's the root of all evil. Cya, Jona
