Greylisting use Netblocks

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meister
Posts: 29
Joined: Mon Nov 06, 2006 8:27 pm

Greylisting use Netblocks

Postby meister » Wed Nov 22, 2006 6:50 pm

"Perform the IP address checks of the sending host based on the /24 subnet it is at rather than the specific IP.
This feature may be useful for legitimate mail systems that shuffle messages among SMTP clients between retransmissions. "

The above is a cut'n'paste from ASSP. Below is the log of gmail trying to send me a message with greylisting enabled. It did get through on the fifth attempt.

2006-11-22 11:12:43 H=nf-out-0910.google.com [64.233.182.185] F=<my_gmail_addy@gmail.com> temporarily rejected RCPT <local_address@xxx.com>: greylisted.
2006-11-22 11:19:30 H=nf-out-0910.google.com [64.233.182.191] F=<my_gmail_addy@gmail.com> temporarily rejected RCPT <local_address@xxx.com>: greylisted.
2006-11-22 11:37:51 H=nf-out-0910.google.com [64.233.182.190] F=<my_gmail_addy@gmail.com> temporarily rejected RCPT <local_address@xxx.com>: greylisted.
2006-11-22 12:09:29 H=nf-out-0910.google.com [64.233.182.184] F=<my_gmail_addy@gmail.com> temporarily rejected RCPT <local_address@xxx.com>: greylisted.
2006-11-22 13:00:15 1GmwON-0000Ig-1y <= my_gmail_addy@gmail.com H=nf-out-0910.google.com [64.233.182.190] P=esmtp S=1608 id=eb471b0a0611220810k7705c500t3001071af8edd4f2@mail.gmail.com
2006-11-22 13:00:15 1GmwON-0000Ig-1y => local_address@xxx.com R=filter_forward T=local_smtp H=127.0.0.1 [127.0.0.1] C="250 OK id=1GmwON-0000Ij-R4"
olivier
Posts: 1348
Joined: Thu Jan 01, 1970 1:00 am
Contact:

Postby olivier » Wed Nov 22, 2006 9:49 pm

that's why you can put domains that won't be greylisted. This is the case of gmail that doens follow the specifications and doesn't manage a message with the same host.
Another solution yould be to bypass greylisting with SPF compliant domains.
I'm actually looking at this solution which I find better than adding "whitelists" of greylists..
itoverblik
Posts: 42
Joined: Tue Apr 09, 2013 3:43 pm
How did you hear about Mailcleaner: google

Re: Greylisting use Netblocks

Postby itoverblik » Thu Jun 13, 2013 2:26 pm

Hi Olivier

Have you found a solution to solve the mails sent from Gmail?
We are having grey-listing problems with mails sent through the Google mail services, because the send from a different source IP address every time they try to resend the message.
After some tries they just give up because they never send the message from the same host.

Other has the same issue with other products


How can we ensure that mails from the Google mail servers get through?
I have noticed the option to add the sender domain in the "avoid grey-listing" but it would be great to add sender hosts not just sender domains.

How can we solve this with mailcleaner?
Thanks in advance.

- Tim
ics
Posts: 66
Joined: Wed Sep 03, 2014 11:05 am
How did you hear about Mailcleaner: googling

Re: Greylisting use Netblocks

Postby ics » Tue Oct 21, 2014 8:10 am

This is an old topic, but I don't find any solution.

Did you finally found a way to bypass greylisting with SPF compliant domains?

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