Send SMTP Mail Message activity not working with out any error

Send SMTP mail message activity are becoming stuck without any error message. It was working properly. But after some test it is not sending any mail and also not producing any error. Workflow got stuck in that activity for a long time.
Can anyone help me with the solution?

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I’ve had this issue twice in the last year, the first time I couldn’t remember how it got resolved.
The same code worked on a another physical or virtual machine but not my machine.

I noticed that if I tried sending mail using the Exchange UiPath activity the email would be sent but not with the SMTP activity.

In the end I rebooted my machine connected back into the office over the vpn and it started working. I think it was something to do with my VPN connection being on for days (possibly the company enforcing something or the other or a timeout has occurred).

SMTP Stuck issue Solved