Apple has confirmed that fix for iOS 11 “Cannot Send Mail. The message was rejected by the server.” error in Outlook, Exchange, Office 365 accounts is coming in software update. Here are the details.

Apple’s iOS 11 platform is now in circulation globally but it looks as though we can expect a bug fix update to be released sooner rather than later. The Cupertino-based company has acknowledged an issue whereby Outlook.com, Office 365, and Exchange 2016 email account holders are unable to send or reply to incoming emails using an account set up through the native iOS 11 Mail app.

Apple has informed all users that it is currently working closely with Microsoft to try and resolve the issue in a timely manner, with the creating company of iOS 11 being forced to publicly acknowledge the issue on iOS 11 launch day through the publication of a dedicated support document:

If your email account is hosted by Microsoft on Outlook.com or Office 365, or an Exchange Server 2016 running on Windows Server 2016, you might see this error message when you try to send an email with iOS 11: “Cannot Send Mail. The message was rejected by the server.”
Apple is working closely with Microsoft to resolve the issue and will release a fix soon in an upcoming software update.

There are still likely a large number of users around the world who think that the issue could be caused by them entering invalid credentials, or entirely confused by the situation and unsure of how to proceed to fix the issue. Apple has moved extremely quickly to publish this support document which sheds light on the problem but doesn’t go into any great detail on why it’s occurring or why the issue wasn’t resolved during the record number of issued iOS 11 beta builds. You only need to look through social media to know that certain beta testers actually reported this very issue to Apple in the first few weeks of iOS 11 being in beta testing.

Apple may be working closely with Microsoft on this issue but it’s likely that Tim Cook’s company won’t be overly keen on the wording used in Microsoft’s own support document about the problem. Microsoft says the cause of the problem is that Apple’s “Mail app on iOS 11 is not compatible with Outlook.com, Office 365, or Exchange Server 2016 running on Windows Server 2016,” which strictly isn’t true, it’s just broken.

Hopefully, a resolution is in sight and we will get an iOS 11.0.1 or 11.1 release to fix this issue.

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