CORNWALL INTERNET
Email filtering
This page is currently under construction.Spam
This page explains Cornwall Internet's "spam" policy. If you have sent email to a Cornwall Internet customer and it has been rejected this page may explain the reason why.What is spam?
Spam is bulk unsolicited email. Most spam is commercial advertising, often for dubious products, get-rich-quick schemes or computer software. Spammers send the same message to a very large number of email addresses (both valid and invalid) in the hope that a small number will reply. The spammers obtain their email lists by, inter alia, searching the Web for addresses, scanning Usenet postings, buying or stealing Internet mailing lists, etc. Spam costs the sender very little to send - most of the costs are paid for by the recipients and their Internet Service Providers.
Our policy
We do not knowingly allow our network to be used to send spam and we will disconnect immediately any users who use our network to send spam.
To protect both our customers and our network, we filter inbound email using "Block lists" and "Spam scanning". All incoming email is filtered using the block lists but spam scanning is a subscription service.
1. Block Lists
We reject email from:
- Known spammers
- Open relays
- Open proxies
- Mail servers on dial up connections
Known spammers - Spamhaus Block List (http://www.spamhaus.org)
Open relays - The Open Relay Database (http://www.ordb.org)
Open proxies - Blitzed Open Proxy Monitor (http://www.blitzed.org/opm/)
Dial up connections - Pan-Am Dynamic List (http://www.pan-am.ca/pdl/)
If you are trying to send us email from a mail server that is listed in any of the above lists we suggest that either you use another mail server or you contact the maintainer of the appropriate list to get the mail server delisted (if appropriate).
We also reject email that has a hotmail or aol address but which does not appear to originate from the hotmail or aol network.
2. Spam scanning
Spam scanning involves scanning the content of an email message to determine whether or not it is spam. Cornwall Internet's spam scanner uses a sophisticated statistical approach which enables the scanner to "learn" the charactistics of the messages that each individual user regards as spam. The user needs to take some time to "teach" the scanner but once this has been done the scaner is highly effective at identifing spam without labelling legitimate messages as spam.
Messages identified as spam may be:
- Tagged as spam
- Deleted
- Bounced
- Transferred to a separate folder
Spam scanning is a subscription service; further details may be found in our Email section.
Contacting us about spam
1. If you have received spam from the Cornwall Internet network please send a copy of the message (including the headers) to abuse@cornwallinternet.com.
2. If you would like to sign up for our "Spam scanning" service send an email with your request to support@cornwallinternet.com.
3. If you have had a message rejected by us you may email us at postmaster@cornwallinternet.com. We are, however, likely to suggest that you or your Internet Service Provider contact the maintainer of the appropriate black list.
4. For other enquiries about Cornwall Internet and our services please email us at enquiries@cornwallinternet.com or use the link "Contact us" at the foot of this page.
Email viruses and spam (the online equivalent of junk mail) are not just annoying, they are potentially damaging to a recipient's computer as well as being a drain on the recipient's resources. They also render Internet Service Provider's networks less efficient than they would otherwise be.
, other organizations, and Internet users. Sending Spam mail may seem like a cheap and convenient way to amplify marketing efforts, yet honest businesses rarely employ this questionable marketing tool. Firstly, nobody wishes to receive unsolicited junk mail. Secondly, it is considered both an annoyance and an intrusion of privacy. Thirdly, each sent e-mail message contributes to Internet traffic and uses up bandwidth. An e-mail message does not reach its recipient instantaneously; instead, it is relayed by any number of systems en route until it reaches its final destination. Spam mail is often sent out in thousands or hundreds of thousands of copies, to huge numbers of unwitting recipients. This large load of messages often causes network problems and congestion, meaning that third parties as well as message recipients are suffering because some inconsiderate person or company has pumped half a million copies of a message through the Internet. Unfortunately, there are many such worthless members of society. For more information on Spam, refer to the links at the end of this document for some excellent reviews of the problem. causing Cornwall Internet's email servers