GMAIL SMTP certificate problem

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Joined: Thu Apr 23, 2020 9:54 am

GMAIL SMTP certificate problem

Postby Berkay » Thu Apr 23, 2020 10:06 am


I've been using gmail as a client for my zimbra account (business e-mail address) without any problem for n.5 years.

however, starting last week, I have started to receive an error message when I try to send e-mails. (receiving them is still fine).

"Server returned error: "TLS Negotiation failed, the certificate doesn't match the host., code: 0"

Some resources informs that, Google won't accept self signed certificates starting from april 2020, so I need to use a certificate signed by a recognised CA.

Do you have any solution for this problem? How can I resume using gmail for sending emails?

Thank you in advance

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Posts: 269
Joined: Sat Sep 13, 2014 3:37 am
Location: Brazil

Re: GMAIL SMTP certificate problem

Postby » Thu Apr 23, 2020 2:53 pm


You can use Let's Encrypt which is free:
My best regards,
Fabio S. Schmidt
Brasília - Brazil

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