We have a 2 stage filtering process; the first stage protects our services, the second is optional and further protects our customers.
We reject the following email, no matter to whom it is addressed:
- From organizations we have caught sending inordinate amounts of undeliverable or unsolicited email.
- Any provider listed on the blacklist at Spamhaus
- Messages without a valid "From:" address.
- Email which fails an SPF check.
Spam Filtering (SpamControl)
Our industry leading filter gives each message a score based on the look and feel of its content. For example, a normal message might score around 0.1, while spam often scores over 3.5.
When you activate SpamControl, you pick a threshold, and any message which scores higher than that is put into a Junk Mailbox on our server. We recommend a threshold of 4.5 or lower.
You also have a "Trusted Senders" list, which allows you to choose which email addresses are never filtered. With our unique "AutoTrust" feature, anyone you send email to will be automatically trusted.
When you have SpamControl turned on, you can receive an optional daily Junkmail Report, giving you a chance to see what we filtered the previous day and allowing you to rescue the rare legitimate message.
The message score is obtained by adding the points assigned by hundreds of tests. Here are some examples of some simple tests:
- A blank "To:" field.
- The word "buy" is mentioned many times.
- There are a lot of exclamation points, stars, or other attention-grabbers.
- It tells you that you've won a million dollars in a foreign country.
If you see legitimate email marked as spam, the most common reason is that the sender used enough spam-like techniques to exceed your threshold. You should add any important contacts to your Trusted Senders list, which will prevent them from ever being filtered.
Spam filtering does not affect mail sent between Whidbey Telecom Internet & Broadband customers.
We do not filter email sent by common, well known and trusted businesses, even if it contains advertising.