How to quiet or mute iOS 12 Mail Send sound?
Same as this question, but iOS has changed.
The whoosh sound when Mail app sends a message is too loud. I've tried the volume down button while using Mail but it didn't change. I muted the receive notification sound already.
How do I change it?
Solution 1:
Try going into Settings then Sounds & Haptics, then scroll down to Sent Mail and select None.