Test SMTP Connection through AfterLogic

I'm using AfterLogic mail server on my website. I am using their SDK, and I need to provide a test functionality where the user would be able to check if the settings they provided works on IMAP and SMTP.

We are able to do it on IMAP, but for SMTP, there's a bit of difficulty. We're testing SMTP by seeing if it can send an email, but to be able to do it, the correct IMAP settings must also be provided. I'm looking for a way on how to test the SMTP settings without having to go through IMAP first.

Any suggestions is highly appreciated.

Thanks!