Re: encryption issue in outlook 2016

On Fri, 14 Sep 2018, ChandranManikandan wrote:

I don't purchase anything. It's installed in the server when install qmailtoaster.

That's the problem -- a stranger has no assurance that the certificate you're presenting actually belongs to your server or someone pretending to be you. Hence the mail reader warning.

Please suggest the procedure.

You got 3 options:

1) Create your own self-signed certificate and have your
users import it.  This may work with small installations
where trust is a phone call away.

2) Install a ACME Certbot to install a Let'sEncrypt
certificate that gets renewed every few months.

3) Purchase a certificate from a recognized CA (sich as
Verisign/Thawte/whoever) and install that.

If you got a few bucks to spend and lacking in technical expertise, 3 is your best option. Instructions?

http://lmgtfy.com/?q=Obtaining+a+CA+signed+certificate

Joseph Tam <jtam.home@gmail.com>