The name or address of the mail server (IMAP server).
This property specifies the IP address (IP number in dotted internet format) or Domain Name of the mail server. It must be set before a connection is attempted and cannot be changed once a connection is in progress.
If this property is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, the MailServer property is set to the corresponding address. If the search is not successful, an error is returned.
If the control is configured to use a SOCKS firewall, the value assigned to this property may be preceded with an "*". If this is the case, the host name is passed to the firewall unresolved and the firewall performs the DNS resolution.