There are several parameters that can be used when using the OPEN WEB URL command option mailto. These are as follows:

Parameter	Syntax
Address message to multiple recipients	, (comma separating e-mail addresses)
Add entry in the "Subject" field	?subject=Subject Field Text
Add entry in the "CC" field	&cc=Someone@domain.com
Add entry in the "Blind Copy To" or "BCC" field	&bcc=Someoneelse@anotherdomain.com
Add entry in the "Body" field	&body=Your message here

For example:

OPEN WEB URL("mailto:user@abc.com,user@def.com?subject=Test Subject&cc=user@ghi.com&bcc=user@jkl.com&body=Test Body")

This statement would open an email window to user@abc.com and user@def.com with a copy sent to user@ghi.com and a blind copy to user@jkl.com with a subject of Test Subject and a body containing Test Body. Notice the ? is used in the first add on feature after the initial feature and the & is used to add on additional features.