Explicitly reject SMTP connections

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Separation of log facilities

Hi,
I'd like to send logging for emails sent from a specific IP to a different syslog facility. I am able to define
the port used by the sending machine and have configured a new instance of smtpd to listen on 26 with the '-o
syslog_facility=' parameter. This successfully captures the connections coming in on 26 but I'd also
like to send the smtp side of things to the same facility. I was thinking transport maps but seems to only be
able to examine rcpt addresses.

Is there a more simple way to do this. Ultimately I'd like to have an instance of postfix (both smtpd and smtp)
listening on a separate port and logging to a difference facility so I can isolate log information without
disrupting current activity.

Thanks,

Rob Kelledy

Disallow Mails to multiple domains in single connection

   I have a custom milter setup on my shared postfix servers that allow
customers to maintain their own blacklists 

A domain admin can simply reject mails at the MTA. ( That gets rid of
all NDR's are backscatter automatically ) 
But that fails when a smtp client sends mails to multiple email ids of
different domains in a single transaction. Can I block this 

Thanks
Ram

max number of multi-recipient aliases?

What is the maximum number of addresses to have in a multi-recipient 
alias? I realize a real mailing list system like majordomo or mailman is 
better for large numbers but I need to use aliases for now 'till I have 
time to set it up and need to know how many I can use before I start to 
run into problems.

Is there any hard limit in postfix?
At what number of aliases can I expect to start to run into some sort of 
problems?

error code 5xx with action as 421.

Hello everyone!

Do we have some 5xx error code, which drop connection immediately as it fo
421?

From docs:
"Use "421" reply codes for botnet-related RBLs or for selected non-RBL
restrictions. This causes Postfix 2.3 and later to disconnect immediately
without waiting for the remote SMTP client to send a QUIT command."

Thank you.

Alex.

Getting error: queue file size limit exceeded

I need help with mail delivery

Conditional smart-host routing

Hi,

I would like to configure a bizarre setup like this:

   if the mail is sent as usual, do not use a smart-host, just
   deliver (that is easy and works)

   if the recipient domain ends in ".through-smart-host", it should
   deliver via a SMTP relay (smart-host). Of course, just before
   delivering, it should remove the ".through-smart-host" suffix.

Something like this could be interesting:

   s/^(.+)\.through-smart-host$/$1/ smtp:[smart-host]

However I didn't figure out how to implement this using pcre_table(1).

If all fails, I could create a new UNIX mailer in master.cf and route
through it, and make it deliver the mail (e.g. through a nullmailer
or something) after changing the destination with a Perl script,
but that would be complicated, slow and clumsy.

Does anyone have any suggestion ?  (basically, what I want is the
obsolete mixed UUCP/domain routing, such as user%domain.org <at> relay.org,
but that doesn't usually work anymore nowadays)

Thank you.

PS: another idea could be to have a specific header or subject to do the
    routing.

rbl / rhsbl services?

Hi again,

where do I get information about current well known 
services to be used for

  reject_rbl_client
  reject_rhsbl_sender
  reject_rhsbl_recipient 

Thanks and regards
-stefan-

Directives SMTP main.cf