On 8/5/22 11:14, Richard wrote: > >> Date: Friday, August 05, 2022 10:39:04 -0400 >> From: Frank Bures <buresf at gmail.com> >> >> 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. "app password" has done the job. Thanks a bunch Frank -- <listfrank1 at gmail.com>