Re: Undelivered Mail Returned to Sender

[Joe Perches]

On Sun, 2017-08-13 at 01:08 +0000, Mail Delivery System wrote:
> This is the mail system at host smtprelay07.hostedemail.com.
> 
> I'm sorry to have to inform you that your message could not
> be delivered to one or more recipients. It's attached below.
> 
> For further assistance, please send mail to postmaster.
> 
> If you do so, please include this problem report. You can
> delete your own text from the attached returned message.
> 
>                    The mail system
> 
> <elfring@xxxxxxxxxxxxxxxxxxxxx>: host mx.sourceforge.net[216.34.181.68] said:
>     550 unknown user (in reply to RCPT TO command)

I believe no patches from Markus should be applied
until this is resolved.