Is it possible to use zoho's smtp with other email accounts?

Is it possible to use zoho's smtp with other email accounts?

I've just begun to try Zoho email and love what I see so far.

I've just added a second email account (my work account) and am receiving mail just fine. However, the work email is not currently set up in a way that I can use its smtp for sending from Zoho ....

So, is it possible to use Zoho's SMTP to send mail from a second email account? Or is there another solution you could recommend?

Thanks in advance for the help.

Kenn