Unfortunately, there's one problem with aliases that seems to have persisted for years that Apple still hasn't fixed, despite my reporting it via feedback during every single beta cycle since at least iOS 8.
It seems that if you have multiple aliases configured and you forward an email that's not directly addressed to any of your aliases (e.g., it was sent to something like "undisclosed recipients" like many do when BCCing multiple folks), the iOS Mail app will pick a non-primary alias to send the forward from.
I've never been clear on what logic it uses for this, as it's not entirely random, but it's not like it picks them alphabetically or in the order in which they were added either. It will pick the same alias each and every time, but it's never the actual primary FROM address, but rather always an alias.
These release notes in iOS 14.1 got me hoping Apple had finally fixed this problem after about six or seven years, but sadly no...
It seems that if you have multiple aliases configured and you forward an email that's not directly addressed to any of your aliases (e.g., it was sent to something like "undisclosed recipients" like many do when BCCing multiple folks), the iOS Mail app will pick a non-primary alias to send the forward from.
I've never been clear on what logic it uses for this, as it's not entirely random, but it's not like it picks them alphabetically or in the order in which they were added either. It will pick the same alias each and every time, but it's never the actual primary FROM address, but rather always an alias.
These release notes in iOS 14.1 got me hoping Apple had finally fixed this problem after about six or seven years, but sadly no...