set up of my website smtp workspace

[AssomeFSP]

Hello,

Informations:

CMS: I have a wordpress website created since june 2024.

hosting: My host is hostinger. 

Email  sender: WP SMTP. I set the free plugin and I used to received emails and each event occurs on the site (sign up, sell, booking.....)

Since Yesterday, My google business profile is enabled. So, I am trying to set up email sending with  Wp SMTP. I have developped an app and put the credentials But, I always receive the message below:

Attention ! Le dernier e-mail que votre site a tenté d’envoyer n’a pas abouti.

Source de l’e-mail : User Verification
Mailer: Google / Gmail
{
"error": {
"code": 401,
"message": "Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.",
"errors": [
{
"message": "Login Required.",
"domain": "global",
"reason": "required",
"location": "Authorization",
"locationType": "header"
}
],
"status": "UNAUTHENTICATED",
"details": [
{
"@type": "type.googleapis.com/google.rpc.ErrorInfo",
"reason": "CREDENTIALS_MISSING",
"domain": "googleapis.com",
"metadata": {
"service": "gmail.googleapis.com",
"method": "caribou.api.proto.MailboxService.SendMessage"
}
}
]
}
}

For more details please try running an Email Test or reading the latest error event.

I have add the code on this documents to my wp code without any resulsts. https://developers.google.com/identity/sign-in/web/sign-in?hl=fr

I need your support to solve this issue.

Best regards!

[KAM]

@AssomeFSP as of March 14, less secure apps using username and password no longer work. See https://support.google.com/a/answer/14114704?hl=en.

You should use a plugin that support OAUTH2 or look at app passwords: https://support.google.com/accounts/answer/185833?hl=en 

HTH, KAM

[AssomeFSP]

Thank you very well for the response. Finally, i have purchased wp smtp pro
plugin. The set up has been automatically done buy them. Thabk you for your
support.

I met à similar issue with my gmail adress authentification with make. I
am still on the need. So, If you can assist on that, it will be wonderful.
Best regards!

[KAM]

@AssomeFSP You'll have to describe your issue with make better but happy to try. -KAM

[AssomeFSP]

Thank you. After doing the nécessaire and get an ID client et secret, I
put them on the dedicated spacieux on make. When I tried the connexion with
my Gmail accojnt, it was blocked.

[KAM]

@AssomeFSP 

I'm afraid I don't work with Gmail much for freemail and this is a forum for Google Workspace.  You might want to go talk to the Gmail product forums at https://support.google.com/mail/community?hl=en -KAM

[AssomeFSP]

Thank you very well. I am a google workspace beginner too. Any ressource
which can facilitate my work will be appreciated.
Best regards !