1 Topic by freeda.suing

  • freeda.suing
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Topic: Can't receive emails - Greylisting in effect other email servers

==== Required information ====
- iRedMail version: 0.8.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  LDAP
- Linux/BSD distribution name and version: Ubuntu 12.04.3 LTS 64-bit
- Related log if you're reporting an issue:
====

Oct 14 10:58:57 mail postfix/smtpd[4236]: NOQUEUE: reject: RCPT from mail-wg0-f44.google.com[74.125.82.44]: 451 4.7.1 <xxxx@example.com>: Recipient address reject
ed: Greylisting in effect, please come back later; from=<xxxx@gmail.com> to=<xxxx@example.com> proto=ESMTP helo=<mail-wg0-f44.google.com>

Okay, I can now send using my iRedMail server to Yahoo and Google. The problem is I can not receive emails from other email servers. I really want the feature of greylisting but it seems too strict and I might encounter receiving problems

Can iRedMail whitelist domains? because it will difficult to whitelist per IP.

----

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

2 Reply by freeda.suing

  • freeda.suing
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Re: Can't receive emails - Greylisting in effect other email servers

To add, when I disabled the greylisting in cluebringer, I was able to receive the emails. Though, is there a recommended setup so that I can blacklist domains (spam protection).

freeda.suing wrote:

==== Required information ====
- iRedMail version: 0.8.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  LDAP
- Linux/BSD distribution name and version: Ubuntu 12.04.3 LTS 64-bit
- Related log if you're reporting an issue:
====

Oct 14 10:58:57 mail postfix/smtpd[4236]: NOQUEUE: reject: RCPT from mail-wg0-f44.google.com[74.125.82.44]: 451 4.7.1 <xxxx@example.com>: Recipient address reject
ed: Greylisting in effect, please come back later; from=<xxxx@gmail.com> to=<xxxx@example.com> proto=ESMTP helo=<mail-wg0-f44.google.com>

Okay, I can now send using my iRedMail server to Yahoo and Google. The problem is I can not receive emails from other email servers. I really want the feature of greylisting but it seems too strict and I might encounter receiving problems

Can iRedMail whitelist domains? because it will difficult to whitelist per IP.

3 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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Re: Can't receive emails - Greylisting in effect other email servers

Just wait for some minutes (maybe up to 30 minutes), and emails will be delivered to your mailbox.

I suggest you (a mail admin) try to understand what greylisting is and how it helps fight spam:
http://www.greylisting.org/

4 Reply by freeda.suing

  • freeda.suing
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Re: Can't receive emails - Greylisting in effect other email servers

Right, I think it was a bad idea disabling the greylisting. I'll enable it back. Though, I dont want our users to have delay receiving messages from our "known" domain like those hosted in google, yahoo etc. Is there a way to whitelist those domains then greylisting will be bypassed.

Thanks Zhang for your continued support. Really appreciate it.

ZhangHuangbin wrote:

Just wait for some minutes (maybe up to 30 minutes), and emails will be delivered to your mailbox.

I suggest you (a mail admin) try to understand what greylisting is and how it helps fight spam:
http://www.greylisting.org/

5 Reply by freeda.suing

  • freeda.suing
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Re: Can't receive emails - Greylisting in effect other email servers

Can I use postfix sender_access?

freeda.suing wrote:

Right, I think it was a bad idea disabling the greylisting. I'll enable it back. Though, I dont want our users to have delay receiving messages from our "known" domain like those hosted in google, yahoo etc. Is there a way to whitelist those domains then greylisting will be bypassed.

Thanks Zhang for your continued support. Really appreciate it.

ZhangHuangbin wrote:

Just wait for some minutes (maybe up to 30 minutes), and emails will be delivered to your mailbox.

I suggest you (a mail admin) try to understand what greylisting is and how it helps fight spam:
http://www.greylisting.org/

6 Reply by ZhangHuangbin

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Re: Can't receive emails - Greylisting in effect other email servers

You can add record in SQL table "cluebringer.greylisting_whitelist" to whitelist certain domains. But it's not recommended to whitelist whole big ISPs, because spammers use big ISPs to send spams. it should be fine to whitelist certain sender emails.

7 Reply by freeda.suing

  • freeda.suing
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Re: Can't receive emails - Greylisting in effect other email servers

Can we just use the web gui of cluebringer?

ZhangHuangbin wrote:

You can add record in SQL table "cluebringer.greylisting_whitelist" to whitelist certain domains. But it's not recommended to whitelist whole big ISPs, because spammers use big ISPs to send spams. it should be fine to whitelist certain sender emails.

8 Reply by ZhangHuangbin

  • ZhangHuangbin
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Re: Can't receive emails - Greylisting in effect other email servers

freeda.suing wrote:

Can we just use the web gui of cluebringer?

Sure.