I can send mail from my C7 box (via sendmail) to myself at my gmail
account using gmail's smtp server. I don't very often forward mail THRU
gmail to other sites, so I don't know if that has changed.
On Fri, Aug 5, 2022 at 11:14 AM Richard <lists-centos@xxxxxxxxxxxxxxxxxxxxx>
wrote:
>
> > Date: Friday, August 05, 2022 10:39:04 -0400
> > From: Frank Bures <buresf@xxxxxxxxx>
> >
> > I have my CentOS7 sendmail configured to relay outgoing system
> > e-mail through my gmail account.
> >
> > The setup recently stopped working. Gmail SMTP keeps returning
> > "service unavailable".
> >
> > I think it has something to do with the recent changes in Gmail
> > authentication procedures.
> >
> > Does anyone know how to make the relaying work again? I could not
> > find anything on the Net.
>
> I'm assuming you are pushing the mail to gmail through port 465 or
> 587. If that's the case, if you aren't already, you will need to set
> up and use a google "app password". Alternatively, get whatever you
> are using on the centos side that authenticates with gmail to support
> OAuth 2.
>
> You can no longer use your google side-wide password to authenticate
> 3rd party apps with gmail so need to use one of the alternatives in
> its place.
>
> I would actually expect you to get an authentication failure message
> so they may have changed something else that disabled this approach.
>
>
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