Sent mail not showing

[GrillGuyMosier]

A few times i have sent messages to other members and when i go to my sent messages they are not there. doesent happen eveytime but it happens.  It happens when i use my computer and my phone.  Is there something im doing wrong?

[LightningBoldtz]

There is an option to check called "Save a copy in my outbox" when you use the web site.

[Garfield]

I'm having problems seeing sent mail, I see 1 in 3 or 1 in 4. I get a message in the senders message saying "you have responded or replyed" but I can't find what I sent in the sent mailbox. This leaves me wondering whether my response was received. Are others having this problem? I exclusively use my iPad Pro to receive and send messages and don't have this problem in other mail programs.