The mailing list for listmasters using Sympa

[Radu Vatav <address@concealed>]

Hello,

yahoo changed policy and is not accepting mails with "From: " 
someone@some_domain and delivery from another_domain. See here:

http://postmaster.yahoo.com/errors/postmaster-28.html

The only way I found that works is setting the list address as 
anonymous_sender, but information about original sender is lost. Yahoo 
suggests setting the original sender as "Reply-to" but I haven't managed 
to do so in sympa.

I tried remove_headers with reply_to_header and some other combinations 
I don't remember, the point is, if I remove the "From" field, it's lost 
forever.

Any tips on how to do this?

Best regards,
Radu Vatav