"""

Email message and email sending related helper functions.

"""

import socket

# Cache the hostname, but do it lazily: socket.getfqdn() can take a couple of

# seconds, which slows down the restart of the server.

class CachedDnsName(object):

    def __str__(self):

        return self.get_fqdn()

    def get_fqdn(self):

        if not hasattr(self, '_fqdn'):

            self._fqdn = socket.getfqdn()

        return self._fqdn

DNS_NAME = CachedDnsName()