Open Relay

Open Relay

An open relay is an email server configured (poorly!) so that anyone on the internet can send email. In the past this was an acceptable method for sending email, but now spammers use open relay to re-route their email through a third party to avoid detection. The CAN SPAM Act of 2003 made it illegal to send spam through an open relay. Most ISPs will not accept email from known open relays.

• A/B Split
• Above-The-Fold
• ASP
• Auto Reply
• Auto Responder
• B2B
• B2C
• Bandwidth
• Blacklist
• Bounce (Hard)
• Bounce (Soft)
• Call To Action
• Campaign
• Can-Spam Act of 2003
• CAPTCHA
• Challenge Response
• Click-Through Rate (CTR)
• Content
• Conversion Rate
• Cost Per Thousand (CPM)
• Database
• Dedupe
• Domain Key / DKIM
• Double Opt-In
• Email Blocking
• Email Client
• Email Newsletter
• Email Service Provider
• eZine
• False Positive
• Font
• From/Sender Address
• From/Sender Name
• Harvesting

• Header
• HTML Email
• IP Address
• ISP
• Landing Page
• Links
• Load Time
• Mailing List
• Multi-Part MIME Email
• Open Rate
• Open Relay
• Opt-In Subscriber
• Opt-Out List
• Opt-Out Subscriber
• Permission Based Email
• Personalization
• Phishing
• Preview Pane
• Privacy Policy
• Rental List
• Segmentation
• Signature
• Single Opt-In
• Spam / UCE
• Spam Trap
• SPF Record
• Spoofing
• Subject Line
• Targeting
• Unique Selling Proposition
• Unsubscribe
• URL
• Viral Marketing
• Web-Friendly Fonts
• Whitelist