You can manage email-related settings such as SMTP Server, SMTP login name, and SMTP password by selecting the Email Settings link. Emails generated by Community Server can only be delivered only if these settings are correct. Let us examine each of these settings in detail.
If disabled, the email system will not function. Hence any feature that generates an email such as Forgot Password, Post Moderation, and Notification to registered users will not work until you enable the setting.
This setting specifies the default email encoding that will be used with all email messages. The default value is utf-8, and it also determines the character set. Some of the other possible values are us-ASCII, utf-7 or unicode.
Note
UTF-8 stands for 8-bit Unicode Transformation Format. You will find more information at: http://en.wikipedia.org/wiki/Utf-8