Post-SMTP-Instructions.md

Plugin overview page, including a video setup guide:

https://wordpress.com/plugins/post-smtp/

Written instructions

1. From your WP-ADMIN dashboard click “Post SMTP” and select “Start Wizard”.
2. Now on the “Who is the mail coming from?” you can add your sending email address and your name.
3. The following page “Which host will relay the mail?” is where you will add the Outgoing Mail Server Hostname. This is the SMTP server info from your email host.
4. Post SMTP will run checks to see if it can reach your SMTP server.
5. Then on “How will the connection to the mail server be established?” you will need to select a “Socket” typically 587 is nonSSL 465 is SSL. (This will vary depending on the mail host and the settings they would like to use.)
6. The last bit of information needed is on the “How will you prove your identity to the mail server?” page. Just add your email Username and Password.
   • Note: using the password to authenticate can have issues. If the plugin isn't working while being set up correctly, try authorizing through OAuth 2.0. For example, Gmail and G Suite accounts can use this process to authorize this plugin to work (click this link to see the instructions).
7. Finally, “You’re Done!”, click finished to complete the process.
8. Once finished they will be taken to the dashboard for the plugin, you can have them test by clicking the “Send a Test Email” under “Actions” heading.
9. To be sure WordPress is using the proper email you may also need to go to Post SMTP > Show All Settings > Message and check both “Prevent plugins and themes from changing this”

I recommend this one because it has great logging to help troubleshoot the connection problem if there is one.