On 21 Jun 2010, at 11:44 PM, James Udo Ludtke wrote:

> In addition to the three arguments "mailto:";, "?subject=", and "&body=", is 
> there a 4th argument to set the from account?

The mailto: URL scheme has a specification (RFC 2368): 
<http://www.faqs.org/rfcs/rfc2368.html>

In the instructions for respondents to the mailto: scheme, the RFC says from= 
should not be accepted:

> Note that some headers are inherently unsafe to include in a message 
> generated from a URL. For example, headers such as "From:", "Bcc:", and so 
> on, should never be interpreted from a URL. In general, the fewer headers 
> interpreted from the URL, the less likely it is that a sending agent will 
> create an unsafe message.
...
> Programs that interpret mailto URLs should ensure that the SMTP "From" 
> address is set and correct.


        — F

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