Step 1: Install Post SMTP Plugin
Download and install Post SMTP directly from the WordPress plugin directory.
Step 2: Activate Post SMTP Plugin
Once the plugin has been installed and activated, a prompt asks you to begin configuring it. Click the setting menu
Step 3: Start The Wizard
After providing your name and email address in the appropriate fields, you will be able to start the process by clicking the “Start the wizard” button
Step 4: Gmail SMTP Server
The plugin will shortly connect with the Gmail SMTP server automatically. Then, select the following option by clicking the Next button
Now Select Gmail API and click on Next
Step 5: Google API Console has the Gmail API
In Step 4, you need to select Gmail API, and then you need to choose Google Cloud Console
Step 6: On Cloud Console, Create A New Project
Add the Project name and organization and create the project
Step 7: Enable the Cloud Console API
Select Enable APIs and Services tab
Select the Gmail API
Click Enable
Navigate to the OAuth Consent screen and select User, type “Internal,” and Click Create
Now add the App Name and Emails, and then click SAVE AND CONTINUE
Now, set 3 discretionary (Scopes) and click on SAVE AND CONTINUE
Step 8: Create a Credential Type
In the following step, you will make SMTP credentials. Choose User Information
Click on CREATE CREDENTIALS, then OAuth client ID
Note down the Client ID and Secret, then put them in the right places in the Setup Wizard for the plugin (step 8). Click Web Client 1 to see your Client ID (OAuth name)
Navigate to the website and Copy the Authorized URL from Post SMTP Step 5
Paste the URLs in the Below screen
Copy the Client ID and Client Secret
Paste the Client ID and Client Secret into the right fields
If you want to use the additional notification feature, then you can select the SLACK or CHROME option from the drop-down; if not, then click on next
Now, click on FINISH
Step 9: Create a “From Address”
Now Goto Post SMTP > Settings > Message Tab and add the email which you are using in your google cloud console
Step 10: Grant Permission with Google
Click Grant permission with Google in your WordPress dashboard under Post SMTP Setup now
Select the Google Email account you wish to use and grant the app permission to access your inbox from the resulting dialog box
Allow the Access and proceed
Step 11: Send a Test Email
At this point, we’ll double-check to make sure everything is functioning as planned. Simply enter the recipient’s email address and select the Send a Test Email option under the Actions tab
This type of email should be received if the settings are all correct
For more details, see the tutorial video: https://www.youtube.com/watch?v=uN_8lNv7KBo&t=7s
For External User Field: –
⦁ If you don’t have a paid account, you are unable to select internal, so select external.
⦁ Fill in the App name, User Support Email, and Developer Contact Information with the correct information & click on the save and continue button until you reach the summary tab.
⦁ Now click on Back to Dashboard.
⦁ Go to credential and click on Create a credential option & select OAuth client ID.
⦁ Select web application in the application type option.
⦁ Go back to the POST SMTP setup wizard and copy Authorized JavaScript’s origins & Authorized redirected URL.
⦁ Get back to google console and paste the Authorized JavaScript’s origins & Authorized redirected URL in their relevant field and select create.
⦁ Your client id and client secret have been generated.
⦁ After completing the above steps go to OAuth Consent Screen tab and click on publish.
⦁ Go back to the POST SMTP setup wizard and paste the client id and client secret in their relevant field.
⦁ Click next and then click finish.
Repeat step 9.
⦁ Click on grant permission with Google and process.
⦁ After that, click on send a test email in the POST SMTP setting and send the email.
Wrap up
You can think of an SMTP server as the digital equivalent of a postman; it either directly delivers your emails to the recipients’ inboxes or forwards them to other postmen outside of your domain. Remember that SMTP servers only handle outbound messages. For incoming emails, you’ll need either an Internet Message Access Protocol (IMAP) server or a Post Office Protocol (POP3) server.
Please visit Postman SMTP documentation if you need to help to send an SMTP email. Create an account right now, and it’s free! Or, if you already have an account and need help, chat with SendGrid’s support team!