Mail can't verify the identity of "mail.xxxxx.com"

[Imola Ghost]

I'm helping a buddy and I don't know what's going on but he has NUMEROUS problems sending/receiving thru his companies email.

He uses the Apple Mail and it seems to work sometimes but it's very frustrating to figure out what's going on.

Once he sends an email he'll have to select some other outgoing mail server in order to get it sent.

He'll get a message saying,

"The certificate for this server is invalid. You might be connecting to a server that is pretending to be "mail.xxxxxxxxxxxxxx.com which could put your confidential information at risk. Do you want to connect to the server anyway"

Ideas?

 

[Macman45]

Download and configure Thunderbird. In the new round of OSX updates, Mail is to be re-vamped.

He can return to it after the update. Tbird works with anything as long as you have the correct port settings.

 

[Guiyon]

That sounds like the mail server he is using is either using a self-signed certificate, there is a mismatch between the CN on the certificate and the FQDN of the server or the certificate expired. I can't really give you any more details without actually seeing the certificate that is being sent by the server. Is this for an private mail server or a provider such as GMail, Verizon, etc?