Alternate text to display in email programs that do not support/display HTML messages.
Other Parameters Required:
-altbody "<single-line plain text message>"
As indicated, the message cannot have any newlines ("return" characters).
Example (cut-and-paste right into your batch file):
NetMailBot -altbody "Since your email program cannot display HTML, we have provided this plain text message" -to email@example.com -from firstname.lastname@example.org -server mail.domain.com -subject "test"
If you were to use them both at the same time, -altbody and -altbodyfile would behave additively.