Yes. All of No-IP.com's mail servers are protected using industry standard
blacklists including
SpamCop,
MAPS,
and
Spamhaus. For POP accounts, the messages are also filtered through Spamassassin. If a message is suspected by Spamassassin to be from a possible spammer, the message is flagged and you can then filter out this message using an email client like Microsoft Outlook.