Digitale Infrastruktur

Steps¶

1. 1. e-Mail senden von meinem client (MS Outlook) - Fehlermeldung erhalten
2. 2. nochmals gleiche e-Mail an andere Adresse bei der gleichen Firma, aus Webmail. Gleiche Fehlermeldung

Observation¶

• Fehlermeldung:
  This is the mail system at host mail-1-p.piratenpartei.ch.

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

<info@ballon-mueller.ch>: host mail.ballon-mueller.ch[92.43.217.102] said: 501
5.7.1 <rudolf.sommer@piratenpartei.ch>... Sender IP must resolve (in reply
to RCPT TO command)

Expectation¶

• KEINE Fehlermeldung!