Postfix - antispam and relay package

[Sn3ak]

Figured I would report my success. The package looks great.
It looks like Anvil Daemon is more or less required, otherwise
it spits out errors in the maillog, and seems to cause a small
connection delay as well (at least on my setup).

I turned off most of the protections, since it is a secondary
MX, and I wasn't doing any filtering previously, at least until
I have a chance to read up more as to what the settings do.

I am however however excited by the Valid recipients from clear
text url option. That will cut out a lot of the junk that gets stuck
in the secondary MX.

I'll need to read more about that, and find out the format of the
text file, and how often it polls, but that is a very nice option.

Thanks for the good work.

[marcelloc]

The format is

Email@domain.com ok
Admin@domain.com ok
.
.
.

As my active directory is on local lan, I've setup a 1h update frequecy.

[Sn3ak]

Thanks, I haven't had a chance to try that.. I do have another problem that you may be able to help me with.

It seems adding:
myhostname=mx02.example.com
smtp_helo_name=mx02.example.com

is ignored by postfix, at first it wasn't being added to main.cf, but finally that started working, however is being ignored.

postconf -d | grep example
mydomain = example.local
myhostname = pfsense.example.local

as well as smtp_helo_name =  not being respected if changed either.

I'm attempting to change the name to my correct external hostname so other email servers (including my primary) don't get
upset due to the .local address

[marcelloc]

Change pfsense host and domain info on system settings.

Did you tried to paste this config on custom field and then checking config file?

[Sn3ak]

Sorry for the late reply, as it turns out the settings did take, however postconf -d
doesn't reflect it, and, using telnet on localhost apparently uses the default and
ignores the setting.

Would it be possible to add a delete option in the queue screen, since you are already displaying the Message ID?
Command would be postsuper -d msgID. Also maybe another button at the bottom for deleting all Mailer-Daemon
emails? Command would be: mailq | grep -v "^[^0-9A-Z]" | grep MAILER-DAEMON | awk '{print $1}' | xargs postsuper -d

If nothing else, I can probably submit patches, as long as you are interested in including them.

[marcelloc]

Good to know this package is being usefull for you. :)

Did you applied postfix conf after changing machine name and domain?

Patches and improvements are welcome, let me test it first before publishing.

[Popupgbg]

Split domain mail functionality

I don´t know if this package can do this but it would be nice to have it with a GUI. I know that sometimes hosting providers is using Postfix to provide a split domain functionality on mailservice. The use Postfix to receive all mails addressed to different recipients in different domains in Postfix. They setup the possibility to forward incoming mail so that mail to a@domain.com  is sent to an POP server and mail to b@domain.com to an Exchange server. This due to the fact that all users in an organization don´t need the functionality of an Exchange server.
This is my request  :)

/Thanks

[madas]

Hello,

I'm trying to modify this part of the main.cf to remove the reject_unknown_sender_domain

–--------------
smtpd_sender_restrictions = reject_unknown_sender_domain,
permit

My server is using a remote DNS so I cannot add a A or MX record for some of my local servers so I need to remove this option (or add a permit_mynetworks above it).

I cannot seem to do this anyway in the gui.  I can do it manually but it seems to be overwritten shortly after.

Any ideas?

Thanks

M

[marcelloc]

Madas,

Include your hosts on my network acl.

[madas]

I have.  The reject_unknown_sender_domain seems to be bouncing the message before the network ACL's are checked.

[marcelloc]

@madas:

I have.  The reject_unknown_sender_domain seems to be bouncing the message before the network ACL's are checked.

It will work if you create this dummy domain on your internal dns and point pfsense to use it.

[madas]

My firewall points directly to the ISP's DNS.  I don't run a local one that is accessible from my firewall.  I just want to remove that restriction

[LinuxTracker]

Finally set this up today and have read through the thread.

I seem to be missing something in the basic configuration.

Notes: I disabled the port 25 NAT and associated rule.
A new rule to allow port 25 to WAN Address is in place and is logged.
I let it run for 15+min.

My Port 25 Rules block 1k spam connects/hour.  I find I've grown attached to them. /notes

Problem:
If I bind to Postfix to WAN, Postfix receives and passes mail correctly; but Port 25 Rules are ignored.
When I bind to loopback-only, I don't see any indication that any mail is reaching Postfix.

In both cases, the Rule Logs show traffic being passed to the WAN address.

What am I missing?

[marcelloc]

Hi linuxtracker,

When you listen postfix on loopback only, you need a Nat rule to forward traffic from wan address to localhost.

In both cases, you need to put block rules before allow rules on firewall tab.

[LinuxTracker]

@marcelloc:

In both cases, you need to put block rules before allow rules on firewall tab.

Crap.  That is exactly what I did.  I know better too.

Now I have to go wear the hat for the rest of the day.

[marcelloc]

No intention to call you dunce, I was just posting full info to solve your problem.
Sorry.  :(

[LinuxTracker]

@marcelloc:

No intention to call you dunce, I was just posting full info to solve your problem.
Sorry.

I wasn't irritated with you.  I was poking fun at myself for making a rookie mistake.

If you hadn't set me straight, I'd probably still be banging my head against it.

So - Thank you.

[digdug3]

Is it possible to forward all incoming domains to another mail server after the email address had been checked?
So * to ip x.x.x.x

[marcelloc]

You can configure smart relay options, but I think it's not a good idea as postfix will accept any email, including relay atempts and your internal server will miss the external IP address to do spam checks.

[digdug3]

@marcelloc:

You can configure smart relay options, but I think it's not a good idea as postfix will accept any email, including relay atempts and your internal server will miss the external IP address to do spam checks.

Ok, but is it possible to add the domains just like the valid recipients? e.g. a txt file from an external url?