For every mail you receive, our antispam system will assess how likely it is that the mail is spam.
This is done by looking at all elements of the mail you receive, ranging from content, structure and headers to the sender server and address. The system also uses previous history for the sender address and the sender server.
Based on the system's analysis, each mail will receive a spam score. A general rule is:
If the score is below 2, it is unlikely that the mail is spam.
Is the score over e.g. 6, it is very likely that the mail is spam.
You can see the spam score, as well as the factors that have resulted in this, in the headers of each mail you receive, and under Antispam in our Mail Administration, by hovering over the spam score.
In our Mail administration you can also set up how aggressively you want the filter to be in relation to your incoming mail. You can set up so the system so that it puts an e-mail under quarantine if it is over a given score (deletion score).
Through our Webmail it is possible to train the spam filter to recognize that some mails are spam. This is done by using the "Spam" button. Note it does not automatically mean mails from the same sender or with the same content always being blocked in the future, this can be done with Filtering rules.
If the antispam system thinks having found a spam mail, it blocks the receipt of the mail and quarantines the mail. You can release the email from quarantine through our control panel, or by receiving a daily email with a list of all mails in quarantine. This is set under Antispam in our Control Panel.
You have the ability to create filtering rules that block or approve individual email addresses or entire domains. You can also see an overview of your last received mails and what score they have received. These scores can help you assess how to set up your settings. With a single click, you can add the sender to your blocked or approved email addresses.
Under Antispam in our Mail Administration you can activate greylisting. Greylisting is an effective way to reject spam. It works by our mail server rejecting the mail with a temporary error and waiting for the sender server to try to send the mail again, after which it is approved. With greylisting, there will thus be a delay of incoming mail from new senders, a delay determined by how often the sender server will retry a mail sending. Normally this is 5-20 minutes.
As a starting point, our antispam does not see newsletters as spam. If you have signed up for a newsletter and do not want it anymore, you should unsubscribe in the normal way. Usually, it is "good" newsletters that accept unsubscriptions that pass through our spam filter.
Article from the support category: Mail
