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I'm running on Rackspace Cloud Servers and I've just setup a CentOS build and installed iRedMail. The problem is, 90% of the email I'm sending gets blocked and I get the error in my maillog:

NOQUEUE: reject: RCPT from unknown[209.85.222.185]: 450 4.7.1 <[email protected]>:
Recipient address rejected: Policy Rejection- Please try later.; 
from=<[email protected]> to=<[email protected]> proto=ESMTP helo='<mail-pz0-f185.google.com>

For spam reasons I've taken out the real emails and put in pseudo ones.

I asked the technical support for some help and it wasn't much help. I've setup the SPF and TXT records but still no luck.

Any tips on what I could try or what I should look at or is this a ridiculous too open a question with too many things that could cause the issue?

Any help would really be appreciated. This is my first time setting up postfix from scratch :|

edit: somebody just told me that the emails are being 'greylisted' by my postfix setup to avoid being spammed.

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  • just thought I'd add - the emails do seem to eventually come through... is that weird? so they are being stopped for some reason, then sent later through dovecot
    – willdanceforfun
    Dec 5, 2009 at 3:22

2 Answers 2

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you mention SPF and TXT records, but forward and reverse DNS need to be correct as well.

edit: easiest way I know to test:

dig -x +short `dig +short your.domain.com`

This should return "your.domain.com". If it does not, then separate the two commands:

dig your.domain.com
dig -x your.ip.address

to see which or both is not working correctly.

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  • thanks for that. would you mind elaborating? how do I check if they are correct?
    – willdanceforfun
    Dec 5, 2009 at 7:01
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Simply white list that domain like cd to /opt/iredapd/tools

Whitelist IP networks/addresses specified in sender domain:
python greylisting_admin.py --whitelist-domain --from '@example.com'

Find more information from the documentation

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