Emails not sending

[gregsmith0]

Hi my 3CX installation has stopped sending emails. The last confirmed send was yesterday at 1400 GMT. Testing my connection I now get

• An error occurred while attempting to establish an SSL or TLS connection. The server's SSL certificate could not be validated for the following reasons: • An intermediate certificate has the following errors: • certificate has expired

I assume that this is related to the expiration of the Lets Encrypt Root certificate IdentTrust DST Root CA X3

Any ideas how I fix this.

Greg

 

[VasilisV_3CX]

Hi @gregsmith0,

Does the license key used have valid maintenance?

How have you hosted this PBX?

 

[gregsmith0]

Hi

Yes it has, The PBX was set up using the express method on a google instance. Until recently we were having an issue with the security certificate not updating due to a regular overnight shut down. We stopped doing that last week and the normal 90day certificate seems to have been renewed as usual.