Email Settings for Exchange Server 2016

Submitted by chiochia on 2018-04-09

Good day! May I know if can I use our mail server (Exchange Server 2016) to send emails for notification? My settings are:

Custom SMTP server

SMTP Server:
Server name:
Port number: 25
Encryption Mode: SSL

Got this error: SMTP connect() failed.

Are you sure that the port number is correct? Usually port 25 is used for unencrypted SMTP connections.


Hi Michał,

To be honest, I only followed the webissues doc and I am confused on what is the right settings. Could you please recommend the right settings for our scenario? If I use port 25 and Encryption Mode SSL, I get this error "SMTP connect() failed". If I use port 587 and Encryption Mode TLS, I get this error "SMTP Error: Could not connect to SMTP host" and in the Event log. "PHP Warning: stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed in C:\inetpub\wwwroot\webissues-server-1.1.5\system\mail\class.smtp.php on line 324"

Sorry I am really confused and thank you for responding to my query.

The error message indicates that there is a problem with the SMTP server's certificate. Unfortunately I don't know the configuration of your server and the supported encryption modes and ports.


Thanks. But just to be sure I can use exchange server 2016 to send email notification? I just have to fix the server's certificate?

I've never tested it with Exchange, but it should work.


Hi! Michał,

Thanks for the heads up. I was able to make it work. With our scenario, I forgot to add our certificate to one of our receive connector. After adding now I can connect. Thanks a lot. Problem Solved!