configuration of outgoing email in eNewsletter

I am not understanding what is required for the outgoing email settings specifically SMTP Outgoing Server, username, password and port.

Here is what I have:
On my host, I created forwarders for each email account for my site - to my gmail account.

I then "send my email as" from that gmail account, and it sends each email as if it came from the website email address.

I checked my "settings" page on gmail and it shows that pop and imap are both enabled.

So where do I find this "smtp" info?
Thanks in advance. Linda