The option to view the full email headers
In the IT field and web server administrator, I often have the need to view the full email headers. It's also helpful in identifying spam.
As an emai hosting provider, this is an essential feature in a mail reader.
Mark Sheppard commented
I was trying for ages to find the option to view the full headers and in the end came to the conclusion that it simply didn't exist :-(. How on earth anyone could write an email app which doesn't give you full access to the data in your email is beyond me. Crazy.
clive Walden commented
Yes. It is ESSENTIAL for troubleshooting issues!
This is essential. It is needed for my primary email reading tool. If you think your program is a toy then you shouldn't have the nerve to charge for the professional version.
My rating will quickly plummet if this is not addressed.
Brandon Ray commented
This would awesome to have on mobile for the same reason posted by OP.