Here's what I submitted via Feedback Assistant:
- Title: mailto URL scheme no longer supports line breaks
- Area: Mail
- Type: Incorrect/Unexpected Behavior
Mail 14.6 no longer supports mailto URLs containing the “%0D%0A” character sequence to specify a line break in the message body. Instead of a line break, this sequence gets converted to literal text “<BR>” in the message body. For apps that use specific formatting in mailto-generated messages to drive back-end business logic, this is a disastrous regression.
This bug is in the Apple Mail app, not in the OS handling of mailto URLs. If you change your default mail app to (for example) Outlook or Gmail, then the “%0D%0A” sequence is still handled correctly.
This affects a lot of apps. Please see this Apple Developer Forum thread for discussion of the impact:
In that forum thread, note the response from “Frameworks Engineer ” who seems to fundamentally misunderstand the issue. Please ensure that this issue is understood as breakage of previously correct behavior. “Support for rich content…has been removed” does not explain the new behavior that inserts the unexpected text “<BR>” into the specified message.