Suggested alternative to #Thunderbird for android? (or do you know what causes this issue?)

I use Thunderbird on my android phone for my email hosted through my web hosting provider, my domain (different registrar). For some reason, I can send and receive #email just fine, but on my phone, when I send it, it doesn't save my sent email. It makes it to the receiver just fine, but I have no record of sending it, let alone what I've sent. When I check my Thunderbird on my Mac, it's also not there, but when I send from the Mac, it saves to my sent emails.

It's been like this from the beginning. I've tried a couple things, but I haven't had the time or energy to solve it, so I just haven't deep dived.

#tech