I viewed the other link but no help.
Here is my issue, only when sending new meeting requests or invites I get the above mentioned error.
550 4.4.7 QUEUE.Expired
My setup as follows,
Server 2012 , Exchange 2013
I can telnet to the mail.domain.com 25
Again this only happens when i try to send calender requests
Diagnostic information for administrators:
Generating server: domain.local
#550 4.4.7 QUEUE.Expired; message expired ##
Received: from domain.local (10.1.0.232) bydomain.local (10.1.0.232) with Microsoft SMTP Server (TLS) id 15.0.516.32; Fri, 3 May 2013 12:09:33 +0200 Received: from domain.local ([fe80::b564:f085:a8f2:145b]) by domain.local ([fe80::b564:f085:a8f2:145b%12]) with mapi id 15.00.0516.029; Fri, 3 May 2013 12:09:33+0200 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: binary From: User@domain.com> To: User@domain.com Subject: Online Systems Thread-Topic: Online Systems Thread-Index: Ac5H4f5gxTOOCpaRRAaDWHMdTJxJogAA+uZA Date: Fri, 3 May 2013 12:09:32 +0200 Message-ID: <c63f24d0f51941bd8cecea624ad8a742@ONLINEXCH1.OnlineIntelligencePtyLtd.local> Accept-Language: en-US, en-ZA Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: <c63f24d0f51941bd8cecea624ad8a742@ONLINEXCH1.OnlineIntelligencePtyLtd.local> MIME-Version: 1.0 X-Originating-IP: [10.1.1.220] Return-Path: User@domain.com X-EsetResult: clean, is OK X-EsetId: 1961053D22C734334D265E