Hi, Separate Security Issue, please remove your Flash 21.0 r0 https://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html Flash Player Version: 29.0.0.171 Current Version https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, . . . .) Note: Other software is offered in the download. <Windows Only> Could you please explain how Firefox has anything to do with your Outlook Email Client online or on your system stopping incoming email. As Firefox is not a Email Client/program there would be no reason that Firefox would be stopping email coming in online or on your system as it has to go through Outlook 1st. Suggest you use a online email system such as yahoo to send yourself email to Outlook to test what is going on. Use another browser Safari to check. If you are using Thunderbird to access Outlook mail please see : https://support.mozilla.org/en-US/products/thunderbird Please let us know if this solved your issue or if need further assistance.

This is a support forum for Mozilla Firefox. You will have to contact your e-mail provider for help. https://support.mozilla.org/en-US/kb/problems-with-email-how-to-find-help