Various anti-spam techniques are used to prevent email spam (unsolicited bulk email).
No technique is a complete solution to th…

There are a number of techniques that individuals can use to restrict the availability of their email addresses, with the goal of reducing their chance of receiving spam.
Sharing an email address only among a limited group of correspondents is one w…

There are now a large number of applications, appliances, services, and software systems that email administrators can use to reduce the load of spam on their systems and mailboxes. In general these attempt to reject (or "block"), the majority …

There are a variety of techniques that email senders use to try to make sure that they do not send spam. Failure to control the amount of spam sent, as judged by email receivers, can often cause even legitimate email to be blocked and for the sender to …

From 2000 onwards, many countries enacted specific legislation to criminalize spamming, and appropriate legislation and enforcement can have a significant impact on spamming activity. Where legislation provides specific text that bulk emailers …

Several approaches have been proposed to improve the email system.
Since spamming is facilitated by the fact that large volumes of email are very inexpensive to send, one proposed set of solutions would require that senders pay …