1 Topic by mosoti (edited by mosoti 2017-04-12 12:02:30)

  • mosoti
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  • Registered: 2016-08-02
  • Posts: 7

Topic: Help with greylisting

==== Required information ====
- iRedMail version (check /etc/iredmail-release):     v0.9.5-1
- Linux/BSD distribution name and version: ubuntu 16.04.02
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro?  NO (I wish)
- Related log if you're reporting an issue:
====
Apr 10 23:35:20 mx postfix/smtpd[14732]: NOQUEUE: reject: RCPT from smtp2-1.nbnco.com.au[49.0.12.212]: 451 4.7.1 <simon.sedgwick@xband.com.au>: Recipient address rejected: Intentional policy rejection, please try again later; from=<prvs=266c32978=ContractManager@nbnco.com.au> to=<simon.sedgwick@xband.com.au> proto=ESMTP helo=<smtp2-1.nbnco.net.au>
====

Starting yesterday, I noticed all mail is being greylisted.

So I suppose the questions are:

Why use greylisting?

Why did this just start happening?

As I don't wish to risk losing messages, I will likely disable greylisting if we cannot resolve.

Look forward to your input.

----

Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.

2 Reply by aarango

  • aarango
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  • Registered: 2016-12-02
  • Posts: 52

Re: Help with greylisting

mosoti wrote:

==== Required information ====
- iRedMail version (check /etc/iredmail-release):     v0.9.5-1
- Linux/BSD distribution name and version: ubuntu 16.04.02
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro?  NO (I wish)
- Related log if you're reporting an issue:
====
Apr 10 23:35:20 mx postfix/smtpd[14732]: NOQUEUE: reject: RCPT from smtp2-1.nbnco.com.au[49.0.12.212]: 451 4.7.1 <simon.sedgwick@xband.com.au>: Recipient address rejected: Intentional policy rejection, please try again later; from=<prvs=266c32978=ContractManager@nbnco.com.au> to=<simon.sedgwick@xband.com.au> proto=ESMTP helo=<smtp2-1.nbnco.net.au>
====

Starting yesterday, I noticed all mail is being greylisted.

So I suppose the questions are:

Why use greylisting?

Why did this just start happening?

As I don't wish to risk losing messages, I will likely disable greylisting if we cannot resolve.

Look forward to your input.

Paste your sender_restrictions from /etc/postfix/main.cf

It seems that any rule from your sender_restrictions is rejecting that email, not greylist.
That domain isn't valid I think, and for that reason your postfix is rejecting that domain.

xxxx@:~$ host -t mx xband.com.au
Host xband.com.au not found: 3(NXDOMAIN)
xxxx@:~$ host -t txt xband.com.au
Host xband.com.au not found: 3(NXDOMAIN)

3 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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  • Registered: 2009-05-06
  • Posts: 30,793

Re: Help with greylisting

As @aarango mentioned, your Postfix setting might be improperly configured, especially "smtpd_recipient_restrictions" parameter. Please show us output of command out "postconf -n".

Also, about greylisting, check our tutorial:
http://www.iredmail.org/docs/manage.ire … reylisting