Authentication and infrastructure
- What is a domain?
- Can email be sent from IPv6 IP addresses?
- Does Transport Layer Security (TLS) improve deliverability?
- What is a host name?
- What is a Canonical Name (CNAME) record?
- What is a sub-domain?
- What is Transport Layer Security (TLS)?
- What is a Reply-To address?
- What are the different types of DMARC policies?
- How many IPv6 IP addresses are there?
- What is an AAAA record?
- What is the Domain Name System (DNS)?
- What is infrastructure?
- What do I need to know about sending from shared and dedicated IPs?
- What is the d= field in DomainKeys Identified Mail (DKIM)?
- What is FCrDNS and what are the requirements?
- What are X-headers?
- What is rDNS?
- What is a shared IP address?
- What is a dedicated server?
- What are the different SPF record authorization types?
- What is a static Internet Protocol (IP) address?
- What is an Internet Protocol (IP) address?
- What is a Simple Mail Transfer Protocol (SMTP) gateway?
- How can I avoid SPF failures if I am reaching the DNS lookup limit?
- What is an A record?
- What is a dynamic Internet Protocol (IP) address?
- How to set up SPF
- What is backscatter?
- Should I continue to use DomainKeys?