[Users] Safe list of authorized "From:" addresses for SMTP

[vitsen at gmx.com]

Hi

my SMTP server allows me to send emails with ANY outgoing (From) 
address. While the lack of any restriction may be convenient in many 
cases, it also poses a potential problem, because sometimes I may 
misspell a From: email address, inserting an address that does not even 
exist, and this would create a problem for the recipient who wants to 
get back to me and cannot because of the wrong address provided by me.

Is there a way in Claws Mail to define a safe list of authorized 
outgoing email addresses? For a given account, only those "From:" 
addresses included in such list would be allowed to go through the SMTP 
servers, while unknown addresses would raise an error message.

Thanks

Stefano