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dstonek
Asked: 2016-10-19 05:55:08 +0800 CST

Postgrey rejecting Dropbox mails

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Centos 6.8 Postfix 2.6.6

I still am having problems with Postgrey greylisting. I forgot my Dropbox password so I followed the know procedure. Dropbox sent me a mail to change it. Postgrey is continuously rejecting dropbox retries.

In my maillog each 5/6 minutes I see dropbox rejections, "reason=new"

I guess this is because sender's IP changes. After 4/5 tries dropbox server stops retries.

How can this be fixed apart of manually add sender in whitelist?

Edit 1: I added "dropbox.com" to /etc/postfix/postgrey_whitelist_clients.local, restarted Postfix but sender=01000157d7ee0e57-3626bd2e-5464-4efc-b36b-a61d9df644d2-000000@email.dropbox.com is rejected (sender's "name" changes every try)

Edit 2:

Oct 18 11:30:36 host postgrey[1813]: action=greylist, reason=new, client_name=a10-6.smtp-out.amazonses.com, client_address=54.240.10.6, sender=01000157d7ee0e57-3626bd2e-5464-4efc-b36b-a61d9df644d2-000000@email.dropbox.com, recipient=d@s

Oct 18 11:30:36 host postfix/smtpd[4306]: NOQUEUE: reject: RCPT from a10-6.smtp-out.amazonses.com[54.240.10.6]: 450 4.2.0 : Recipient address rejected: Greylisted, see http://postgrey.schweikert.ch/help/s.html; from=<01000157d7ee0e57-3626bd2e-5464-4efc-b36b-a61d9df644d2-000000@email.dropbox.com> to= proto=ESMTP helo=

Edit 3: After hours one of rejected IPs was used again so mail was delivered

Oct 18 14:03:39 host postgrey[1813]: action=pass, reason=triplet found, delay=10532, client_name=a27-148.smtp-out.us-west-2.amazonses.com, client_address=54.240.27.148, sender=01010157d8133997-c0c68e0b-a976-4319-9e67-0f18785a6bbe-000000@email.dropbox.com, recipient=d@s

Oct 18 14:03:39 host opendkim[1496]: 004561CA0888: message has signatures from dropbox.com, amazonses.com

Oct 18 14:03:40 host postfix/qmgr[12510]: 004561CA0888: from=<01010157d8133997-c0c68e0b-a976-4319-9e67-0f18785a6bbe-000000@email.dropbox.com>, size=6972, nrcpt=1 (queue active)

postfix email-server postgrey

1 Answers

  1. Try this setting in /etc/postfix/postgrey_whitelist_clients.local or /etc/postfix/postgrey_whitelist_clients

    # Clients that should not be greylisted.  See postgrey(8)
# use regexp to match the sending hostname for whitelisting
/^a*-*\.smtp-out\.amazonses\.com$/
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