E-mail standards


The following applies to the delivery of Internet e-mail through Belgacom's network.

  • Belgacom's mail servers will not accept connections from unsecured systems. These include open relays, open proxies, open routers, or any other system that has been determined to be available for unauthorized use.
  • Belgacom's mail servers will not accept connections from systems that use dynamically assigned or residential IP addresses.
  • Belgacom's mail servers will reject connections from any IP address that does not have a reverse DNS (PTR).
  • Belgacom may reject connections/mails from senders whose recipient lists consistenly generate a higher than 10% bounce failure rate (i.e. over 10% of a sender's mailing list is destined for users that do not exist on our systems).
  • Belgacom may reject connections/mails from senders who are unable to accept bounce-return messages destined for their domain.
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