MDaemon's built-in web server supports the Secure Sockets Layer (SSL) protocol. SSL is the standard method for securing server/client web communications. It provides server authentication, data encryption, and optional client authentication for TCP/IP connections. Further, because HTTPS support (i.e. HTTP over SSL) is built into all major browsers, simply installing a valid digital certificate on your server will activate the connecting client's SSL capabilities.

The options for enabling and configuring WorldClient to use HTTPS are located on the SSL & HTTPS screen under Setup » Web & IM Services » WorldClient (web mail)". For your convenience, however, these options are also mirrored under "Security » Security Settings » SSL & TLS » WorldClient".

For more information on the SSL protocol and Certificates, see: SSL & Certificates

This screen only applies to WorldClient when using MDaemon's built-in web server. If you configure WorldClient to use some other web server such as IIS, these options will not be used SSL/HTTPS support will have to be configured using your the other web server's tools.

Accept the Following Connection Types

HTTP only

Choose this option if you do not wish to allow any HTTPS connections to WorldClient. Only HTTP connections will be accepted.


Choose this option if you want to enable SSL support within WorldClient, but do not wish to force your WorldClient users to use HTTPS. WorldClient will listen for connections on the HTTPS port designated below, but it will still respond to normal http connections on the WorldClient TCP port designated on the Web Server screen of WorldClient (web mail).

HTTPS only

Choose this option if you wish to require HTTPS when connecting to WorldClient. WorldClient will respond only to HTTPS connections when this option is enabled — it will not respond to HTTP requests.

HTTP redirected to HTTPS

Choose this option if you wish to redirect all HTTP connections to HTTPS on the HTTPS port.

HTTPS port

This is the TCP port that WorldClient will listen to for SSL connections. The default SSL port is 443. If the default SSL port is used, you will not have to include the port number in WorldClient's URL when connecting via HTTPS (i.e. "" is equivalent to "").

This is not the same as the WorldClient port that is designated on the Web Server screen of WorldClient (web mail). If you are still allowing HTTP connections to WorldClient then those connections must use that other port to connect successfully. HTTPS connections must use the HTTPS port.

Select certificate to use for HTTPS/SSL

This box displays your SSL certificates. Click a certificate to designate it as the one WorldClient will use. Double-click a certificate to open it in the Certificate dialog for review.

MDaemon does not support multiple certificates for WorldClient. All WorldClient domains must share a single certificate. If you have more than one WorldClient domain then enter those domain names (and any others that you wish to use to access WorldClient) into the option called "Alternative host names (separate multiple entries with a comma)" outlined below.


Select a certificate in the list and then click this button to delete it. A confirmation box will open and ask you if you are sure that you want to delete the certificate.

Create Certificate

Click this button to open the Create SSL Certificate dialog.

Host name

When creating a certificate, enter the host name to which your users will connect (for example, "").

Organization/company name

Enter the organization or company that "owns" the certificate here.

Alternative host names (separate multiple entries with a comma)

MDaemon does not support multiple certificates — all WorldClient domains must share a single certificate. If there are alternative host names to which users may be connecting and you want this certificate to apply to those names as well, enter those domain names here separated by commas. Wildcards are permitted, so "*" would apply to all sub domains of (for example, "", "", and so on).

Encryption key length

Choose the desired bit-length of the encryption key for this certificate. The longer the encryption key the more secure the transferred data will be. Note, however, that not all applications support key lengths longer than 512.


Choose the country or region in which your server resides.

Hash algorithm

Choose the hash algorithm that you wish to use: SHA1 or SHA2. The default setting is SHA2.

Restart web server

Click this button to restart the web server. The web server must be restarted before a new certificate will be used.