[SOLVED] Frequently getting 450...address verification in progress

[Mank]

Some of our users are frequently getting the following error in zimbra web client:

msg - SMTP server reported: 450 <username@domain.com>: Recipient
address rejected: unverified address: Address verification in progress

This happens when users are sending email through the web client. What is the cause of this issue and how do I resolve this.

I am on zcs-Network-4.5.6 /SLES 9

Thanks.

[phoenix]

Welcome to the forums.

Have you modified the file postfix_recipient_restrictions.cf and added this:

reject_unverified_recipient

If you have please remove it and see if the problem goes away.

[Mank]

Thank you for the quick response!

I removed that entry and also removed "reject_unlisted_recipient". Will post a follow up soon.

I now have these two entries in that file:
reject_non_fqdn_recipient
reject_unknown_recipient_domain

Will these two entries be any cause for concern? I am trying to keep away from spam as much as possible.

Regards,
Mank

[phoenix]

No, those entries shouldn't cause you any problem. Let us know if removing the original entry fixes your problem.

[Mank]

Removing that entry indeed fixed the problem. Thanks!

[phoenix]

Glad it worked and thanks for the follow-up.

[Pascal]

Hi,

I have a question regarding this matter:

a few seconds after receiving the "Address verification in progress" log entry, I get the following log entry:

Oct 9 11:37:38 xxxx postfix/smtp[5376]: 4947C4F6001: to=<info@xxxx.xx>, relay=relay.xxxx.xx[00.00.00.00]:25, delay=91, delays=0.02/0.01/91/0.06, dsn=2.0.0, status=deliverable (250 ok)

Does this mean Postfix is trying to deliver the mail at a later time, or do I have to try again?

[uxbod]

Its been delivered

250 ok

Please open a new thread instead one of that is very old ... ZCS has moved on quite a bit since then