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Other mail system problem ('451', ['4.7.0 Temporary server error. Please try again later. PRX4

asifjanjua88
Level 1
Level 1

‎03-20-2018 06:06 AM - edited ‎03-08-2019 07:35 PM

The email are not being delivered by Iront Port to Exchange server and we are getting below error on IronPort. 

I can send the emails but issue is only related to inbound emails. 

 

(DCID 601597) Delivery started for message 1123223 to test@domain.com

20 Mar 2018 15:07:23 (GMT +03:00)
(DCID 601597) Message 1123223 to test@domain.com delayed. Reason: 4.3.0 - Other mail system problem ('451', ['4.7.0 Temporary server error. Please try again later. PRX4 ']) []

20 Mar 2018 15:07:23 (GMT +03:00)
Message 1123223 to test@domain.com pending until Tue Mar 20 15:21:09 2018 as per

 

Message 1123223 to test@domain.com pending until Tue Mar 20 15:21:09 2018 as per bounce profile Default.

1 person had this problem
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Libin Varghese
Cisco Employee
Cisco Employee

‎03-20-2018 08:05 AM

The error on the delivery connection indicates an issue on the destination server, so you may want to investigate on the server IP seen on the DCID as to why connection from the ESA is being bounced back. 

 

Checking online this appears to be an error specific to Exchange servers

 

https://social.technet.microsoft.com/Forums/lync/en-US/2146be27-e7a1-4725-8f1b-c343de5d9077/451-470-temporary-server-error-please-try-again-later-prx4?forum=exchangesvrgeneral

 

Regards 

Libin Varghese 

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