On Apr 28, 2015, at 9:01 AM, 孙志勇 455750938@qq com [Dada Mail Developers] > <""孙志勇 455750938@qq com [Dada Mail Developers]\"" dadadev@PROTECTED>> wrote:

OK I have read on postfix org, it seems its flag for return-path is -r, not -f -f flag is for "Sender" header so how can I add -r flag to test it?

http://www postfix org/pipe 8 html

Looks like both -f and -r do the same thing - the manage entry for both are identical:

http://www postfix org/sendmail 1 html

-r sender Set the envelope sender address This is the address where delivery problems are sent to With Postfix versions before 2 1, the Errors-To: message header overrides the error return address

-f sender Set the envelope sender address This is the address where delivery problems are sent to With Postfix versions before 2 1, the Errors-To: message header overrides the error return address

If you would like to see if this makes a difference in Dada Mail, open up the dada/DADA/Mail/Sendmail pm file, and find these lines:

        }elsif($local_li->{add_sendmail_f_flag} == 1 && defined($local_li->{admin_email})){     

            if($local_li->{verp_return_path} == 1){ 
                $live_mailing_settings = $l_mail_settings 
 ' -f'
 $self->_verp($plain_to_address);
            }else{
                $live_mailing_settings = $l_mail_settings 
 ' -f'
 $local_li->{admin_email};
            }

        }else{ 

Change the '-f' to, '-r' ,

        }elsif($local_li->{add_sendmail_f_flag} == 1 && defined($local_li->{admin_email})){     

            if($local_li->{verp_return_path} == 1){ 
                $live_mailing_settings = $l_mail_settings 
 ' -r'
 $self->_verp($plain_to_address);
            }else{
                $live_mailing_settings = $l_mail_settings 
 ' -r'
 $local_li->{admin_email};
            }

        }else{ 

Cheers,