SMTP account works, IMAP does not, verify emails not sent

To clarify per my original query:

1. the outbound email works correctly

2. when adding the outbound email, the verify test works correctly (to verify-external…)

3. Adding the inbound email does NOT work because Zammad is NOT sending a verification email (at least not via the above outbound smtp connector)

4. I have access to the imap/smtp server and can see that Zammad is NOT sending a test/verification email only doing a successful IMAP connection:

Aug 9 20:18:51 xxx imapd: LOGIN, user=x@x, ip=[192.168.0.1], port=[39036], protocol=IMAP
Aug 9 20:20:17 xxx imapd: DISCONNECTED, user=x@x, ip=[192.168.0.1], headers=0, body=0, rcvd=36, sent=278, time=86

This is all you see. There is no attempt to send the verification email. The verification process will never complete because the verification email is NOT sent.

Hoping this is clear now. Can you assist as to why Zammad is not sending the verification email?

Thanks, Robby