Email Not displaying correctly Outlook/iPhone

**Hi, ** We use a PHP email class that handles sending emails in HTML and allows for attachments. There is an error when displaying the emails in like Outlook / iPhone clients etc - It shows the emails as Plain Text and Attachments as Plain Text (you can see this in the attachment of an example in a notepad copied from outlook). However if i look at the emails in web clients such as Google mail or [login to view URL] (provided by the VPS - horde/Atmail) it shows the HTML and attachments correctly. Our VPS was recently upgraded from Plesk 10.1 to Plesk 10.4 and since this change the emails not been showing correct. Your job is to find the cause and fix it. I believe what is causing the problems is server side and not PHP as this was working correctly last week. Thanks ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform PHP, MySQL