How to fix the problem of sending messages from the exchange server?

Question

Email

I'm having trouble sending messages.
Information from the mailer:
Diagnostic information for administrators:
Generating server: WinServ.myserv.com
Total retry attempts: 129
[email protected]
Remote Server returned '550 4.4.7 QUEUE.Expired; message expired'
Original message headers:
Received: from WinServ.myserv.com (192.168.50.50) by
WinServ.myserv.com (192.168.50.50) with Microsoft SMTP Server (TLS) id
15.0.847.32; Wed, 16 Nov 2016 20:27:21 +0100
Received: from WinServ.myserv.com ([fe80::f860:e634:edc1:84a]) by
WinServ.myserv.com ([fe80::f860:e634:edc1 :84a%12]) with mapi id
15.00.0847.030; Wed, 16 Nov 2016 20:27:21 +0100
From: Dima Dima
To: Mark Popper
Subject: FW:
Thread-Topic Topic:
Thread-Index Message Topic: AQHSQAM9qULSxQtxrEytUB28RL/TRqDbotQw
Date: Wed, 16 Nov 2016 13:06:32 +0000
Message-ID: <[email protected]. com>
References:
In-Reply-To:
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [80.80.80.80 ]
Content-Type: multipart/alternative;
boundary="_000_74c9114fb1284483b611c8665376a0b1 WinServcorpmyservcom_"
MIME-Version: 1.0
Information from exchange servera - delivery report:
11.18.2016 20:20 WinServ.myserv.com
Delivery of this message has been delayed. The system will continue trying to deliver the message.
Failed
18/11/2016 8:20 PM WinServ.myserv.com
This message could not be delivered.
[{LRT=};{LED=550 4.4.7 QUEUE.Expired; message expired};{FQDN=};{IP=}]
The server works in conjunction with Postfix
I used to use the IP x-originating-ip: [80.80.80.80]
Now it's different, why is it still there ?
Tell me where to look and how to fix it, thanks

Answer 1

As I understood on Exchange as a smart host the postfix is ​​specified.
The first thing to do is to telnet from the Exchange server to access Postfix port 25. If it is unavailable, then Expiration is natural, Exchange tries to send letters to a non-existent host.