# Email Policy

This page is directed towards admins of [MTAs](MTAs "wikilink"). If you
do not understand the following paragraphs, you are most likely not
within the target audience. If you wish to contact us please refer to
the information provided [here](Noc "wikilink"). Make sure you have the
information that was added to the error message (client, time, server)
before you contact us!

### Requirements for sending email to mur.at hosted addresses

In order to send email to an address that is hosted on our mailserver,
the machine running your MTA must fullfill **all** of the following:

-   valid FQDN (eg efeu.mur.at)
-   valid PTR (eg 89.106.208.66, 2a02:3e0::66)
-   FQDN and PTR **must** match
-   MTA **must** use the FQDN in HELO/EHLO greeting

### Blacklist

We do maintain our own blacklist for hosts/domains/IP-addresses that
send a strikingly high amount of SPAM messages. Usually strikingly means
that users start to complain. If you are maintaining a blacklisted host,
you will know how and whom to contact to request being removed from the
list.

### Whitelist

We do maintain our own whitelist for hosts/domains/IP-addresses that -
for some reason - are not able to comply with above listed requirements.
If you experience problems in sending email to mur.at hosted addresses
and have no way in fixing your MTA you can ask to be whitelisted.

### Greylisting

\--(GreyListing is in use here.)\--

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KategorieEmail