gmail won't delete

[AC Question]

My G-Mail messages keep coming back even after I delete them from my Samsung Galaxy S6. Why won't they go away?

 

[B. Diddy]

Welcome to Android Central! Are you using the Gmail app or the stock Email app? If the latter, are you using the Gmail POP3 server or IMAP server? IMAP works better in this regard. Read more here: IMAP vs POP3

 

[double p]

I have the same problem sometimes with the Gmail app. If I have multiple emails that I read and delete, sometimes the last one doesn't actually delete and shows back up in my inbox. Is that the same thing you're experiencing?