0
votes
2answers
64 views

Can I get postfix to drop all mail meant for a specific MX?

TL;DR: can I DISCARD outgoing mail to a specific server by DNS name of the MX record , or failing that, by its IP? We've some 'trouble' (well, more of an annoyance really), of people filling out some ...
2
votes
1answer
59 views

Postfix thinks IP is in blacklist, but is not actually listed in blacklist

Got a bit of a weird problem here with Postfix. Been getting a whole bunch of notices where fail2ban has banned 69.164.196.21 (ryujin.darkdna.net) for failures against Postfix. Here is a relevant ...
1
vote
0answers
114 views

Postfix: Resend 'hard' bounces

I had a number of messages get rejected by the recipient's mail server with a status 550 code due to an IP address blacklist. I've sorted the problem that caused the host to become blacklisted, and ...
0
votes
1answer
81 views

Should I put SPF checks before or after RBL checks in Postfix SMTP server?

I am setting up a Postfix SMTP server (pre v2.10) and was thinking to put the smtpd_recipient_restrictions as follows. smtpd_recipient_restrictions= permit_mynetworks, ...
1
vote
1answer
319 views

In postfix how can I conditionally enforce check_sender_access

I am servicing 2 virtual domains: domain1.org , domain2.org. I want to enforce the following policy: If a client connects from an IP address in $mynetworks then I want to allow only mails for which ...
2
votes
2answers
812 views

Postfix restrict recipients

how can I configure postfix to allow sending to a certain (external) domain only? I'm already using check_recipient_access. Content of my /etc/postfix/recipients_restrictions: domain.com OK My ...
0
votes
1answer
710 views

postfix global white/blacklist defined by pair

I have defined global whitelist in postfix using MYSQL with the following options: smtpd_recipient_restrictions = reject_invalid_hostname, check_client_access ...
-2
votes
1answer
196 views

Black Listing in outbound relayed e-mail

We send outgoing e-mail with one server relaying e-mail through another server. When e-mail is getting black-listed, is it the originating server that is being blacklisted or the relay?
0
votes
1answer
673 views

PostFix Blacklist Configuration

I have setup up a basic email server using PostFix with Dovecot/IMAP. But i face some issue with the blacklist setup. below is my postfix main.cf smtpd_recipient_restrictions = check_sender_access ...
4
votes
2answers
2k views

Refuse to send email to specific recipients with Postfix

So, right now I am halfway through trying to setup an outgoing-mail blacklist, by way of smtpd_recipient_restrictions. The problem I am experiencing is that my test emails are being delivered when I ...
1
vote
1answer
389 views

Blacklisting Specific From and To with Postfix

I have a scenario where I need to blacklist emails from one email to one of our local emails. Is blocking this specific scenario possible in postfix? For example, emails from person@fromaddress.com ...