How to block emails that FROM doesn't belongs to server domain list
rob.verduijn at gmail.com
Thu Aug 16 09:17:28 IST 2012
Oops ... need to wake up here.
replace ptr with spf
I meant spf records (sender policy framework) duh....
2012/8/16 Rob Verduijn <rob.verduijn at gmail.com>:
> If you mean mails that fake sending from your domain to your domain
> (or anywhere else) you might wanna look into dns ptr records.
> It's a simple trick that allows the receiver to perform a dns lookup
> on the sending mail server to verify if it's one of the valid mail
> servers for that domain.
> It's not foolproof since the receiving end has to do this, but if the
> receiving end is you it works like a charm :)
> With ptr dns records you will no longer receive mails from a sender
> that claims to be from your domain, and a lot of other mail servers
> who have their ptr record defined as well.
> I know google uses it since I forgot a mailserver in the dns ptr
> record once, and it started rejecting all the mail from that specific
> mail server.
> 2012/8/16 Sergio <secmas at gmail.com>:
>> Hi all,
>> how may I can block and delete any email that is trying to be delivered from
>> the server that the FROM is none of the domains that belongs to the server?
>> Could this be done?
>> Best Regards,
>> Sergio Cabrera
>> MailScanner mailing list
>> mailscanner at lists.mailscanner.info
>> Before posting, read http://wiki.mailscanner.info/posting
>> Support MailScanner development - buy the book off the website!
More information about the MailScanner