I have enable the "Send mail as:" option for some clients in order to be able send mail from their domain through gmail. I had some complains that they got error message while they to use this function. The message they get is
From Mail Delivery Subsystem
The response was: TLS Negotiation failed, the certificate doesn't match the host.
Strange thing is that when i go to Virtual Panel and press the buttons in order to copy domain's SSL certificate as the default for the chosen service (attached photo) problem get solved but only for some hours. When the problem returns i check again Virtualmin and buttons appear again and i have to click again in order to solve the problem. It seem that system cannot keep these settings but i cannot figure why :-/
Any help will be appreciated.