SMTP Servers to Use in Demos

Recently there was an internal email thread on which SMTP server to use in demos. I thought I'd share the comments from that thread:

• Person 1: I tried gmail  (smtp.gmail.com, port 465) this morning, it works fine.
  To use gmail, you must enable 2-step verification for your google account and generate App password. https://support.google.com/mail/answer/185833?hl=en

• Person 2:  I use https://www.hmailserver.com 

• Person 3: I, too, use hMailServer as a local SMTP server on my demo VMs, with a mail client (usually Outlook) also on the VM. So no need to connect out to an SMTP server on the Internet. Saves a lot of hassle and risk.