Time: 16.12.2015, 9:00 am
Affected: Users of UNIX-Mail servers “mailer.gwdg.de” or “mailer.mpg.de” (not Exchange!)
Impact: Gradual limitation of Sending E-mails
Sending of e-mails through UNIX-Mail server “mailer.gwdg.de” or “mailer.mpg.de” for general user operations will be gradually limited. In the future, this SMTP-service will be exclusively available only for the registered users.
The Exchange service users are not affected with these changes, unless someone have explicitly configured his SMTP Outgoing-server to “mailer.gwdg.de” or “mailer.mpg.de”.
Accordingly, the users who had configured their Outgoing SMTP-server to use UNIX-Mail servers in the past, they should change their configurations to use the Exchange server „email.gwdg.de instead. For more information, please see this manual: Link
The restriction will occur as the following:
16.12.2015 – non-authenticated SMTP-connections (Port 25) from the Goettinger WLAN-subnet
01.02.2016 – non-authenticated SMTP-connections (Port 25) from the Goettinger VPN-subnet
01.03.2016 – complete shutdown including authenticated SMTP-connections (Port 25 and 587) for all non-registered users
System-Administrators who want to use UNIX-Mail servers “mailer.gwdg.de” or “mailer.mpg.de” as Outgoing SMTP-server, they can request allowance of the service.