Library items tagged: spam

This is JANET(UK)’s response to the Department for Business, Innovation and Skills consultation on Implementing the Revised EU Electronic Communications Framework. JANET(UK) is the operator of JANET, the UK’s National Research and Education Network, that connects universities, colleges, research organisations and regional schools networks to each other and to the Internet.
Anonymous
Interacting with the filters Testing your filters Additional information Bad and good source IP addresses Virus checking Dropping binary Windows® executables at the gateway
Anonymous
Rodney Tillotson The expectation that e-mail services will return a failure notice or report for messages that cannot be delivered is no longer realistic. In most cases Janet-connected organisations should not attempt to provide such notifications.
Anonymous
RFC is Request For Comments
Anonymous
If your mailer has been an open relay for some time, and particularly if it has been used by spammers, it may well be on one or more blacklists. The blacklists are a very important co-operative activity of the anti-spam community. Certain organisations or individuals maintain lists of IP addresses or address ranges and make them available in ways which enable users of the lists to reject attempted mail transfers from those addresses. Once your mailer is working properly you should check with all the lists you know and request removal if necessary.
Anonymous
Janet(UK) recommends that you configure your Janet access router to block connections from Janet (and the rest of the Internet) to TCP port 25 (SMTP) of almost all IP addresses in your network. The addresses of a small number of mailers which are carefully managed and are not a relaying risk can then be released from the block; for a small organisation this may be a single IP address.
Anonymous
Much of the required behaviour can be achieved by configuring your mail software. The details vary considerably between products and you should consult the product documentation or present your requirements very carefully to any contractors managing your mailers. It is unfortunate that in many cases the default behaviour (the way the software works as delivered or following a standard installation, upgrade or patch) is to openly relay, so you should check after making any changes.
Anonymous
Expected behaviour Internal means two different things, each of which is important when describing the action of a mail system.