You may wish to prevent plain SMTP authentication if the client is not on a secure connection (SSL or TLS). This can be useful when you wish to meet PCI compliance. Be careful when setting this value, as it will prevent users from sending email if they have not configured their email client to use SSL/TLS.
Setting the option is done through the editing of the Windows registry. The registry keys below need to be added. The listen port is for the primary listening port and the alternate is for the submission port. This option is only available in MailEnable version 6.60 and later.
On 64bit Windows:[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Mail Enable\Mail Enable\Connectors\SMTP]
On 32bit Windows:[HKEY_LOCAL_MACHINE\SOFTWARE\Mail Enable\Mail Enable\Connectors\SMTP]
The value of the key can be:
0 = (default) this allows authentication
1 = no authentication allowed
2 = allow authentication, but only if the port is SSL or TLS has been initiated
You need to restart the SMTP service after any change.
Configuring extra SMTP ports with this option:
|Product:||MailEnable (ME-5.X ME-6.X Pro-5.X Pro-6.X Ent-5.X Ent-6.X)|
|Class:||HOWTO: Product Instructions|
|Revised:||Wednesday, May 4, 2016|