Exchange issue: Remote Server returned '500 5.3.3 Unrecognized command'
Hello, I have been having this issue for some time now and cant seem to narrow it down. We have one vendor we cant email. Everytime I lookup the error it states their server does not have sufficient disk space. I have redacted our server info. I cant seem to figure out where the error is coming from because they keep telling me their server has sufficient space. I also performed a couple of MX tests and their server seems to fail the TLS tests.
remote.TFSJax.com rejected your message to the following email addresses:
'rreyes@tfsjax.com' (rreyes@tfsjax.com)
The recipient's email system can't process this message. Please try resending the message later.
remote.TFSJax.com gave this error:
Unrecognized command
Diagnostic information for administrators:
Generating server: "my mail server"
rreyes@tfsjax.com
remote.TFSJax.com
Remote Server returned '500 5.3.3 Unrecognized command'
Original message headers:
Received: from "my mail server" by
"my mail server" with Microsoft SMTP Server
(TLS) id 15.0.1263.5; Fri, 29 Dec 2017 10:12:40 -0500
Received: from "my mail server" by
"my mail server" with Microsoft SMTP Server
(TLS) id 15.0.1263.5; Fri, 29 Dec 2017 10:12:39 -0500
Received: from "my mail server" ([fe80::b8bb:d61a:d661:452
"my mail server"([fe80::b8bb:d61a:d
15.00.1263.000; Fri, 29 Dec 2017 10:12:39 -0500
From: "me:
To: "'rreyes@tfsjax.com'" <rreyes@tfsjax.com>
Subject: Test
Thread-Topic: Test
Thread-Index: AdOAt3TkYICXtvZZRzORQP6KJ/
Date: Fri, 29 Dec 2017 15:12:39 +0000
Message-ID: <cb403fd5fab544589c51c3e9e
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-ms-exchange-transport-fr
x-originating-ip: [xxx.xxx.xxx.xxx]
Content-Type: multipart/alternative;
boundary="_000_cb403fd5fab
MIME-Version: 1.0
Return-Path: "my email"
DNS RESULTS:
Reply from 96.94.55.86: bytes=32 time=21ms TTL=58
Reply from 96.94.55.86: bytes=32 time=15ms TTL=58
Reply from 96.94.55.86: bytes=32 time=14ms TTL=58
Reply from 96.94.55.86: bytes=32 time=14ms TTL=58
Ping statistics for 96.94.55.86:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 14ms, Maximum = 21ms, Average = 16ms
C:\Users\administrator.CO>
Server: "my dns server"
Address: xxx.xxx.xxx.xxx
Non-authoritative answer:
Name: remote.TFSJax.com
Address: 96.94.55.86
C:\Users\administrator.CO>
Server: "my dns server"
Address: xxx.xxx.xxx.xxx
Non-authoritative answer:
Name: tfsjax.com
Address: 96.94.55.86
C:\Users\administrator.CO>
Server: "my dns server"
Address: xxx.xxx.xxx.xxx
Name: 96-94-5-86-static.hfc.comc
Address: 96.94.5.86
2017-12-29-11_01_54-Network-Tools_-D.png
remote.TFSJax.com rejected your message to the following email addresses:
'rreyes@tfsjax.com' (rreyes@tfsjax.com)
The recipient's email system can't process this message. Please try resending the message later.
remote.TFSJax.com gave this error:
Unrecognized command
Diagnostic information for administrators:
Generating server: "my mail server"
rreyes@tfsjax.com
remote.TFSJax.com
Remote Server returned '500 5.3.3 Unrecognized command'
Original message headers:
Received: from "my mail server" by
"my mail server" with Microsoft SMTP Server
(TLS) id 15.0.1263.5; Fri, 29 Dec 2017 10:12:40 -0500
Received: from "my mail server" by
"my mail server" with Microsoft SMTP Server
(TLS) id 15.0.1263.5; Fri, 29 Dec 2017 10:12:39 -0500
Received: from "my mail server" ([fe80::b8bb:d61a:d661:452
"my mail server"([fe80::b8bb:d61a:d
15.00.1263.000; Fri, 29 Dec 2017 10:12:39 -0500
From: "me:
To: "'rreyes@tfsjax.com'" <rreyes@tfsjax.com>
Subject: Test
Thread-Topic: Test
Thread-Index: AdOAt3TkYICXtvZZRzORQP6KJ/
Date: Fri, 29 Dec 2017 15:12:39 +0000
Message-ID: <cb403fd5fab544589c51c3e9e
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-ms-exchange-transport-fr
x-originating-ip: [xxx.xxx.xxx.xxx]
Content-Type: multipart/alternative;
boundary="_000_cb403fd5fab
MIME-Version: 1.0
Return-Path: "my email"
DNS RESULTS:
Reply from 96.94.55.86: bytes=32 time=21ms TTL=58
Reply from 96.94.55.86: bytes=32 time=15ms TTL=58
Reply from 96.94.55.86: bytes=32 time=14ms TTL=58
Reply from 96.94.55.86: bytes=32 time=14ms TTL=58
Ping statistics for 96.94.55.86:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 14ms, Maximum = 21ms, Average = 16ms
C:\Users\administrator.CO>
Server: "my dns server"
Address: xxx.xxx.xxx.xxx
Non-authoritative answer:
Name: remote.TFSJax.com
Address: 96.94.55.86
C:\Users\administrator.CO>
Server: "my dns server"
Address: xxx.xxx.xxx.xxx
Non-authoritative answer:
Name: tfsjax.com
Address: 96.94.55.86
C:\Users\administrator.CO>
Server: "my dns server"
Address: xxx.xxx.xxx.xxx
Name: 96-94-5-86-static.hfc.comc
Address: 96.94.5.86
2017-12-29-11_01_54-Network-Tools_-D.png
Last Comment
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Jason Crawford
Well it does certainly sound like a recipient issue but SMTPSend Protocol Logs from your Exchange server would help in proving it. Is verbose logging enabled on the Send Connector associated with this recipient?
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ASKER
Thank you for confirming, I have been thinking the same thing but they don't have any IT support. So when I talk to them they don't understand how to troubleshoot from their end.
Just think of it as job security for those of us who take this seriously :)
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