Bash Vulnerability Information

Information regarding the current BASH vulnerability and what is being done about it can be found in our Support section located HERE.

Support and Troubleshooting

Why does my e-mail get Spam Tagged?
Our filter only tags inbound messages, outbound messages have a different filtering system to prevent compromised accounts, email viruses, etc. What you are seeing is inbound tagging from the mail filter on what it considers to be suspect email messages. Whenever a message is delivered to our mail filter, it goes through a number of scans which can be separated into 4 groups, Blacklists, Greylists, Viruse, Intent/ Bayesian.

The first filter is the Blacklist filter, this check the inbound message to see if it was received from a known source of spam. If the message comes from a known spam source, the filtering appliance will block the message without any farther scanning. The system uses a number of live blacklists which update constantly throughout the day.

The second filter is a virus filter, which scans the email for viruses in the attachment or links. If a virus is found, the message will be blocked.

The third filter is the Greylist filter, this filter checks the actual payload of the message (subject, attachments, body, etc) to see if it fits any known patterns of previously reported spam that has been reported to a number of spam reporting agencies. The message is scored on a scale of 0 - 10.

The last filter is a Bayesian filter, which actually reads the email for relevance and context, and makes an approximation of the likelyhood the message is unwanted, ranking it on a scale of 0-10.

After the scans, the Greylist and Bayesian filters are added, and if the total is above a certain threshold the message will be tagged as possible spam. If the score is higher, it will block the message altogether. (2+ for tagging, 3.5+ for blocking)

Again, the tags are only informational for the user to provide assistance in sorting out possibly unwanted messages. If the same messages are being tagged on a different email account, that is occurring on a separate filtering system that is run by a separate company.

Your customers will not receive spam-tagged messages from our filter, if your messages are being received as spam by your customers or partners, the tagging is occurring through their service provider or their mail client software.

As a policy, we do not whitelist any text or email addresses, as any message containing those email addresses or text would circumvent our filtering system. (the email address in the from: portion of an email is typically forged in a spam message, and is sometime your own email address).
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