Topics Map > Web
Topics Map > Microsoft 365 > Email
Topics Map > Microsoft 365 > Known Issues
Topics Map > Operating Systems > Mac

Microsoft 365 (Known Issues) AdBlock Browser Add-on Rejecting Messages in Safari

Individuals report they do not receive emails and/or receive a failed delivery report after sending an email. This problem is related to a bug in the Safari web browser add-on called "AdBlock". AdBlock appends additional code to Microsoft 365 emails, causing many spam filters to flag messages as spam. This is not an Microsoft 365 bug.

Resolution Status: Uncertain

AdBlock appears to have resolved this issue and updated their app since this article was created. Please see their support site for more information.


Disable the AdBlock browser add-on, use a different web browser, or Mac OS X configuration to connect to Microsoft 365.


KeywordsO365, Office 365, OotW, Outlook, Outlook user, Outlook 2013, Outlook 2011, Outlook 2010, Outlook 2014, email, emails, email reject, rejection, rejects, Safari, AD Block, known issue, M365, Microsoft   Doc ID42449
OwnerHelp Desk K.GroupUW-Milwaukee Help Desk
Created2014-08-04 12:12:40Updated2024-03-27 13:04:58
SitesUW-Milwaukee Help Desk
Feedback  0   0