Unable to send emails from my Midco email

[Shel-Shel]

When I send an email, it goes into outbox into Queue. I keep trying to send it won't go. I can send from gmail but not my Midco email. Is there a place to change settings? I have a Galaxy A15 5G

[3Fees]

Look here :

https://www.samsung.com/us/support/troubleshoot/TSG10001480/

Cheers
3Fees