My client is complaining of fail to their overseas partner> i checked our Mdaemon log as per error below. Please why I received error below. Please advise
thanks
* Connection established 123.176.73.72:65169 --> 54.83.87.114:25
Waiting for protocol to start...
<-- 220 mail555.messagelabs.com ESMTP Wed, 19 Jan 2022 00:49:11 +0000
--> EHLO angel.samoa.net.ws
<-- 250-mail555.messagelabs.com Hello angel.samoa.net.ws [100.112.12.210]
<-- 250-SIZE 52428800
<-- 250-8BITMIME
<-- 250-PIPELINING
<-- 250-PIPE_CONNECT
<-- 250-CHUNKING
<-- 250-STARTTLS
<-- 250-PRDR
<-- 250 HELP
--> STARTTLS
<-- 220 TLS go ahead
SSL negotiation successful (TLS 1.2, 256 bit key exchange, 256 bit AES encryption)
SSL certificate is valid (matches cluster1a.us.messagelabs.com and is signed by recognized CA)
--> EHLO angel.samoa.net.ws
<-- 250-mail555.messagelabs.com Hello angel.samoa.net.ws [100.112.12.210]
<-- 250-SIZE 52428800
<-- 250-8BITMIME
<-- 250-PIPELINING
<-- 250-PIPE_CONNECT
<-- 250-CHUNKING
<-- 250-PRDR
<-- 250 HELP
--> MAIL From:<LDM@transworks.ws> SIZE=3558
<-- 250 OK
--> RCPT To:<takeo.ouchi.23@mhi.com>
<-- 421 Service Temporarily Unavailable
--> QUIT
Original Message:
Sent: Dec 22, 2021 04:56 AM
From: Sergey Petrenko
Subject: Emails blocked
Hello,
the emails that we are sending to .messagelabs.com being blocked with the following messages :
<-- 553-DMARC domain authentication fail. Refer to the
<-- 553-Troubleshooting page at https://knowledge.broadcom.com/e
<-- 553-xternal/article?legacyId=TECH246726 for more
<-- 553 information. (#5.7.1)
Sometimes emails received, sometimes not. It's not a permanent error.
Emails have good DKIM sign and verified DMARC record. Others email providers accept that emails without errors.
Kindly help to resolve.