Realtime Spammers BlackList (RSBL) - This blacklist is currently in "frozen" status for an unspecified time period, however the database still returns results. RSBL is part of ANTISPAM-UFRJ, the official antispam website of the Laboratory for the Processing of Analog and Digital Signals (PADS/COPPE/UFRJ). The ANTISPAM-UFRJ is a realtime database with the mission to supply the Mail Transport Agents (MTA) of the hosts in the PADS and in others networks with the most recent information about open-relay hosts, spammers hosts or dialup machines on the Internet.
Are you confident your email is getting through?
You rely on email for business critical communication, so you need to know your email has been delivered to your customers and you need to know who is sending email on your behalf.
MxToolbox is YOUR expert on email deliverability. Delivery Center analyzes your DMARC, DKIM and SPF to give you the insight you need to make email configuration changes and get your emails to your customer's inboxes.