The best sites online where taking an antispam test for newsletters
It provides a software for Windows to download that uses the well-known anti-spam system "SpamAssassin" (installed on almost all online servers). It allows you to check if the email has spam content.
It is an online service that checks your email, and report any problems of spam and sending.
It is an online service that checks your email, and report any spam problems. Just send email to an email address generated at the time, wait a few seconds to get the result.