Go to the the ADMIN tab tab > PLUGINS > > then select select SMTP MAINTENANCE.
Click on the on the GREEN + button button. (See image) to add a new mail server.
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When you click on the the GREEN + a a dialogue box will appear. That is where you will fill out the credentials for the server and and click Create.
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Now you will be able to test your your SMTP Account right right away to make sure the credentials are correct and that it is running how it should be.
To do this you will click on the Envelope Icon.
Once the envelope is will click on the Envelope Icon.
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Once the envelope is open it will display another window. There you will enter in your will enter in your email address.
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Once you've entered your email then click on then click on ‘SEND TEST’. This is going to let you know whether it was successful or not. You will see the results by scrolling down to the bottom (see image).
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Note: If it does NOT read does NOT read "SUCCESSFUL", chances are there is something wrong with the credentials.
Google SMTP
You will need to enable “Less Secure Apps” inside your Google settings.
Inside your admin console, go to Security, then turn on Less Secure Apps. https://myaccount.google.com/lesssecureapps
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Google host: smtp.gmail.com
SendGrid SMTP
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Host Name: smtp.sendgrid.net
Username: apikey (Not your actual API key- type in “apikey”)
From Email: the address associated with this SMTP Profile
password: API key from Sengrid