Re: Using 'nolisting' to reduce spam

3 msg	Server configuration Error
1 msg	relay_transport
1 msg	Catch-all mailbox
4 msg	Trouble with HTC S710 device and SMTPS
3 msg	psotfix server TLS failed
3 msg	failed-delivery message notifications setup
2 msg	proxy_interfaces understanding
1 msg	warning: transport virtual failure
2 msg	how to relay for most recipients and forward fo...
2 msg	Rewriting outbound addresses
2 msg	virtual mailboxes/domains and aliases
3 msg	Enforced TLS Success?
1 msg	Postfix 2.5 RC2 and snapshot release
11 msg	Problem with Postfix and LDAP (SSL / TLS)
4 msg	More on Enforced TLS
3 msg	delivery reciept
4 msg	How to repeat delay_warning_time messages ?
2 msg	sender notification

Using 'nolisting' to reduce spam
\ Glen Eustace (16 Jan 2008)
. \ postfix (16 Jan 2008)
. \ Jorey Bump (16 Jan 2008)
. . \ Robert Schetterer (16 Jan 2008)
. . . \ mouss (17 Jan 2008)

1 msg	mail priority by sender

Subject:	Re: Using 'nolisting' to reduce spam
Group:	Postfix-users
From:	mouss
Date:	17 Jan 2008

Robert Schetterer wrote:

> Hi i use nolisting since months and i didnt miss valid mails
> and at the beginning it helped a lot against bots
> no the benefit is nearly gone as bots now react to greylist/nolist
> but i agree it may be one cheap feature in the spam war
> special for high botted sites

There are tw things:
- does this work today
- will this work tomorrow

the following logs show that bots retry (too much, so they can be
caught, but just because some rateware is stupid doesn't mean every
rateware is).

Jan 15 22:14:04 balou postfix/smtpd[29889]: NOQUEUE: reject: RCPT from
unknown[190.11.149.215]: 550 5.1.1 <1020009>: Recipient
address rejected: User unknown in virtual mailbox table;
from=<unbindingfz9> to=<1020009>
proto=ESMTP helo=<personal-1c35e2.cpe.intraway.com>
Jan 15 22:14:04 balou postfix/smtpd[29889]: NOQUEUE: reject: RCPT from
unknown[190.11.149.215]: 550 5.1.1 <1020009>: Recipient
address rejected: User unknown in virtual mailbox table;
from=<unbindingfz9> to=<1020009>
proto=ESMTP helo=<personal-1c35e2.cpe.intraway.com>
Jan 15 22:14:04 balou postfix/smtpd[29889]: NOQUEUE: reject: RCPT from
unknown[190.11.149.215]: 550 5.1.1 <1020009>: Recipient
address rejected: User unknown in virtual mailbox table;
from=<unbindingfz9> to=<1020009>
proto=ESMTP helo=<personal-1c35e2.cpe.intraway.com>
Jan 15 22:16:49 balou postfix/smtpd[29902]: NOQUEUE: reject: RCPT from
unknown[200.118.218.97]: 550 5.1.1 <1020009>: Recipient
address rejected: User unknown in virtual mailbox table;
from=<reconsideringpcd85> to=<1020009>
proto=ESMTP helo=<GESTION2.cable.net.co>
Jan 15 22:25:06 balou postfix/smtpd[29971]: NOQUEUE: reject: RCPT from
client26.lom.cz[85.193.26.26]: 550 5.1.1 <1020009>:
Recipient address rejected: User unknown in virtual mailbox table;
from=<102000974.15389792855951> to=<1020009>
proto=SMTP helo=<client26.lom.cz>
Jan 15 22:32:42 balou postfix/smtpd[30049]: NOQUEUE: reject: RCPT from
nas5.ozerki.net[85.249.160.15]: 550 5.1.1 <10403>: Recipient
address rejected: User unknown in virtual mailbox table;
from=<dwsimoncarterm> to=<10403> proto=ESMTP
helo=<nas5.ozerki.net>
Jan 15 23:40:38 balou postfix/smtpd[30542]: NOQUEUE: reject: RCPT from
unknown[87.247.249.98]: 550 5.1.1 <10403>: Recipient address
rejected: User unknown in virtual mailbox table;
from=<nuzzlingu315> to=<10403> proto=ESMTP
helo=<[87.247.249.98]>
Jan 15 23:40:38 balou postfix/smtpd[30542]: NOQUEUE: reject: RCPT from
unknown[87.247.249.98]: 550 5.1.1 <10403>: Recipient address
rejected: User unknown in virtual mailbox table;
from=<nuzzlingu315> to=<10403> proto=ESMTP
helo=<[87.247.249.98]>
Jan 15 23:40:38 balou postfix/smtpd[30542]: NOQUEUE: reject: RCPT from
unknown[87.247.249.98]: 550 5.1.1 <10403>: Recipient address
rejected: User unknown in virtual mailbox table;
from=<nuzzlingu315> to=<10403> proto=ESMTP
helo=<[87.247.249.98]>
Jan 15 23:40:38 balou postfix/smtpd[30542]: NOQUEUE: reject: RCPT from
unknown[87.247.249.98]: 550 5.1.1 <10403>: Recipient address
rejected: User unknown in virtual mailbox table;
from=<nuzzlingu315> to=<10403> proto=ESMTP
helo=<[87.247.249.98]>

These logs are on a new box that started to get mail attempts before it
was declared as an MX (most were relay attemps).

what I mean here is that it's more than nolisting: you don't need to
have an MX. so I'm gonna put some domains without MX and see...