SharePoint Garbled Email Issue

Recently I came across an issue where ‘Alert Me’ emails originated from SharePoint environment are getting garbled and reaching the customers in following format.

Resolution After troubleshooting it was found that somehow recent patch on Exchange Server was adding a line break in Internet Email header messing up the Header itself, which was garbling the Email body and it was showing something like this. 
On analyzing multiple garbled email headers and comparing them to working email header it was found that these garbled messages were missing the “Reply To” address.
Setting up the ‘Reply To’ address in SharePoint Admin for the Farm fixed the issue.

Note that this issue was only with ‘Alert Me’ email relaying outside the company to extranet users, within companies Email Addresses there seems to be no issue. 
Also a point to note that this entry was missing for last 2 years and we never faced this issue, nothing was changed on SharePoint server when this issue was brought to our notice. So something change on Exchange server which triggered this. Strange issue but all is well that ends well. Issue is now resolved.

Sample Garbled Email Body (if you are facing the same, making 'Reply To Address' for Outgoing email is worth a shot.

:
x-alerttitle: =?utf-8?B?dGVzdG==?=
x-alertid: {13A68C34-6874-4DB1-A19E-
DE7A3EDBCC86}:{16710775-18E9-
4177-85EA-4EA332E2A971}
content-class: sharing
Content-Transfer-Encoding: 8bit
x-alertservertype: STS
x-alertweburl: =?utf-8?B?
aHR0cHM6Ly90cmljYXJlLWdvdmVybm1lbnQuaW50ZXJuYXRpb25hbHNvcy5jb20vZ3JpZXZhbmNl?=
x-sharing-config-url: stssync://sts/?ver=1.1&type=
documents&cmd=add-folder&base-
x-sharing-remote-uid: {950403C4-C7C8-49DC-A575-
6249BDE8F5DE}
Content-Type: text/html; charset=utf-8
Subject: test - WEB.CONFIG Ajax Configuration.do...
x-sharing-wssbaseurl: =?utf-8?B?
aHR0cHM6Ly90cmljYXJlLWdvdmVybm1lbnQuaW50ZXJuYXRpb25hbHNvcy5jb20vZ3JpZXZhbmNl?=
x-alertwebsoap: =?utf-8?B?
aHR0cHM6Ly90cmljYXJlLWdvdmVybm1lbnQuaW50ZXJuYXRpb25hbHNvcy5jb20vZ3JpZXZhbmNlL192dGlfYmluL2FsZXJ0cy5hc214?=
MIME-Version: 1.0
X-Mailer: Windows SharePoint Services (version 3)

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