Following are the few sites from where we can test our mailserver and domain for testing, reputation and blacklsiting.
Blacklist Checking
- https://www.blacklistmaster.com/check?t=<ip address>
DKIM Testing
- http://dkimcore.org/c/keycheck
IP/Domain Reputation and Scores
- http://www.senderbase.org/lookup/?search_string=<ip address or domain>
- https://www.senderscore.org/lookup.php?lookup=<ip address>&validLookup=true
- http://mxtoolbox.com/
Scan Website for Malware
- http://sitecheck.sucuri.net/