Title: Google Mailer Error
Last modified: November 7, 2025

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# Google Mailer Error

 *  Resolved [hotchd](https://wordpress.org/support/users/hotchd/)
 * (@hotchd)
 * [7 months ago](https://wordpress.org/support/topic/google-mailer-error/)
 * I’m trying to set up Google as my mailer, but on Google Cloud, after I’ve set
   up my client, I get a “Access blocked: Google SMTP for WP Mail SMTP Mailer’s 
   request is invalid” error. I’ve checked the Redirect URI, authorized the app,
   and published my app, and everything looks ok. A colleague experienced the same
   error. Any ideas or advice would be helpful, thanks!

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Support [Patrick](https://wordpress.org/support/users/paddyam/)
 * (@paddyam)
 * [7 months ago](https://wordpress.org/support/topic/google-mailer-error/#post-18714152)
 * Hi [@hotchd](https://wordpress.org/support/users/hotchd/),
 * Thanks for reaching out, and I’m sorry you’re running into this issue.
 * The error you’re seeing is coming from Google and typically means there’s a problem
   with the credentials used during the authorization request. To troubleshoot, 
   if you have confirmed all the credentials from your Google app, try signing out
   of any default Google accounts in your browser by visiting Google.com. Then reconnect
   using the same account you used to create your Google app (client ID and client
   secret).
 * If the issue persists, I recommend reconfiguring the Google/Gmail mailer by following
   our[ step-by-step guide.](https://wpmailsmtp.com/docs/how-to-set-up-the-gmail-mailer-in-wp-mail-smtp/)
 * Prefer video? Here’s a [video walkthrough](https://www.youtube.com/watch?v=m7wd016ARSU)
   guide.
 * I understand this can be frustrating, and I appreciate your patience. Please 
   note this limitation is from Google, not WP Mail SMTP.
 * If you’d like to explore alternative mailers, you can view the full list of [Supported Mailers](https://wpmailsmtp.com/docs/a-complete-guide-to-wp-mail-smtp-mailers/).
 * Hope this helps and thanks again!
 *  [kaljade](https://wordpress.org/support/users/kaljade/)
 * (@kaljade)
 * [6 months, 3 weeks ago](https://wordpress.org/support/topic/google-mailer-error/#post-18720116)
 * I’m having issues also, I tried deleting the Oauth and readding it and get the
   following:
 * **Access blocked: wpmailsmtp.com has not completed the Google verification process**
 * wpmailsmtp.com has not completed the Google verification process. The app is 
   currently being tested, and can only be accessed by developer-approved testers.
   If you think you should have access, contact the developer
 * .
 * If you are a developer of wpmailsmtp.com, see error details
 * .
 * Error 403: access_denied

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Google Mailer Error’ is closed to new replies.

 * ![](https://ps.w.org/wp-mail-smtp/assets/icon-256x256.png?rev=1755440)
 * [WP Mail SMTP by WPForms - The Most Popular SMTP and Email Log Plugin](https://wordpress.org/plugins/wp-mail-smtp/)
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 * 2 replies
 * 3 participants
 * Last reply from: [kaljade](https://wordpress.org/support/users/kaljade/)
 * Last activity: [6 months, 3 weeks ago](https://wordpress.org/support/topic/google-mailer-error/#post-18720116)
 * Status: resolved