* Jaroslaw Grzabel <ja...@meil.me>:
> Ralf Hildebrandt wrote:
> > Which sender? If anton sends mail to bertha, the the verification is done 
> > HOW?
> >
> > Like:
> > MAIL FROM:<ja...@meil.me>
> > RCPT TO:<ja...@meil.me>
> > ?
> >
> >   
> Hi Ralf,
> 
> If emails comes from an...@domain.com to ber...@otherdomain.com I would
> like to check it sending original data, so to ask otherdomain.com server
> if bertha exists and tell to that server that  emails comes from
> an...@domain.com not postmas...@myserver.com or <> or variable from
> address_verify_sender.

Some systems block mail if sender and recipient are the same!
Especially if THEIR sender is used coming from the outside...

BUT verifiying mail from an...@domain.com to ber...@otherdomain.com
using "ber...@otherdomain.com" as sender and "an...@domain.com", now
THAT could make sense!!!

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebra...@charite.de | http://www.charite.de
            

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