when sending an email, it is sooooooo slow in sending. this just started to happen recently
I have this issue too and sometimes I need to Force quit the application. Upon restart, I need to retype the email as it is never saved to Drafts.
Could be that either something is interfering with the connection, or there is a server issue.
As a test, can you completely disable any anti-virus, firewall, proxy or VPN, then try send again. Sometimes even restarting your router may resolve this.
If that doesn’t help, send a message and when it seems not to be going anywhere, go to Menu > Operations > Log tab. Look for an SMTP error.