1 Topic by 2009tester

  • 2009tester
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Topic: Greylist configuration settings & re-try settings

==== Required information ====
- iRedMail version: 0.8
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: Debian Squeeze
- Related log if you're reporting an issue:
====
for incloming mail:
which configuration file holds greylisiting delay settings?
Grey list has some delay settings for incoming mail.
and a setting for duration of white listing.
====
for out-going emails:
which configuration file holds resend retry timer intervals for outgoing mail
which encounters a server with greylist policyd?

----

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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  • Registered: 2009-05-06
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Re: Greylist configuration settings & re-try settings

Since you use Debian Squeeze, i assume you're running Policyd-1.82 (postfix-policyd).

The greylisting delay is not up to Policyd, instead, it's up to the sender server. Policyd rejects the email, sender server will retry to deliver it.

- For Policyd settings, please check /etc/postfix-policyd.conf.
- For outgoing settings, check Postfix (/etc/postfix/main.cf).

3 Reply by linusaurus

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  • Registered: 2009-07-09
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Re: Greylist configuration settings & re-try settings

well i did look for some clues in the mySql database. It appears that an entire block of addresses in the 216.146.33.% is blocked. This address range is related to Dynamic DNS services, a very known company that does lots of email and dynamic DNS.  i not sure why policyd is blocking out the whole range of these addresses becuase it not listed on any RTBL list.

4 Reply by ZhangHuangbin

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Re: Greylist configuration settings & re-try settings

Because spammers like dynamic DNS services, they can simply re-dial to get a new IP address, then flooding again. Many ISPs use third-party RBL service to block spam, includes servers which has dynamic IP addresses. That's why you'd better use a static IP address for mail server.

5 Reply by linusaurus

  • linusaurus
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Re: Greylist configuration settings & re-try settings

ZhangHuangbin wrote:

Because spammers like dynamic DNS services, they can simply re-dial to get a new IP address, then flooding again. Many ISPs use third-party RBL service to block spam, includes servers which has dynamic IP addresses. That's why you'd better use a static IP address for mail server.

well that maybe, but a large percentage of our customers seem to be using there cell phones to send and recieve emails, and we look bad if we are constantly blocking there emails. I only hope that whitelisting will over ride this is I enter there entire email domain as " @domain.com"