As of 12 hours ago all email sent to my office 365 account are getting a similar bounceback to the below:
My domain is registered with 1and1.co.uk and my email is forwarded onto my Office 365 account. Everything has been fine for months and no config changes!
Can anyone help!
MailEnable: Message could not be delivered to some recipients.
The following recipient(s) could not be reached:
Recipient: [SMTP:peter@REMOVED.co.uk]
Reason: Remote SMTP Server Returned: 503 This mail server requires authentication when attempting to send to a non-local e-mail address. Please check your mail client settings or contact your administrator to verify that the domain or address is defined for this server.
Message headers follow:
Received: from localhost ([127.0.0.1]) by home with MailEnable ESMTP; Sun, 14 Oct 2012 01:32:17 +0100
Received: from 176.255.69.35 ([176.255.69.35]) by
webmail.REMOVED (Horde Framework) with HTTP; Sun, 14 Oct 2012
00:32:17 +0000
Message-ID: 20121014003217.11654swn9pjokav4@webmail.REMOVED
Date: Sun, 14 Oct 2012 00:32:17 +0000
From: REMOVED
To: REMOVED
Subject: TEST
MIME-Version: 1.0
Content-Type: text/plain;
charset=ISO-8859-1;
DelSp="Yes";
format="flowed"
Content-Disposition: inline
Content-Transfer-Encoding: 7bit
User-Agent: Internet Messaging Program (IMP) H3 (4.3.11)
