How do I retrieve emails that were accidently sent to save

[AC Question]

When responding to a long email on my phone, Accidently hit an unknown button. Screen prompt indicated this data sent to save email file.

 

[anon8380037]

When responding to a long email on my phone, Accidently hit an unknown button. Screen prompt indicated this data sent to save email file.

Is it in the "Draft" folder?
If so open, click Edit and continue.