RBL and DNSBL are something we all want to make sure we don't get listed on. RBL is an abbreviation for 'Real-time Blackhole List' and DNSBL is an abbreviation for DNS Blocklist or DNS blacklist. There are a number of variations of these depending on the organization publishing them, such as Barracuda Centrals (barracudacentral.org) BRBL (Barracuda Reputation Block List).
Most network administrators are aware of how to check to see if your mail server is on a blacklist whether it be a RBL or DNSBL or any of its variations. The problem with most of them is that most of them check by IP Address. What about your domain reputation.
There are several reasons why you should stop using free email addresses for your business. Using free email addresses, such as gmail / hotmail or [email protected], could position your business as spam and give potential customers the view that your business is not properly established or credible.
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