Authentication and infrastructure
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What are the different types of DMARC policies?
There are three different types of Domain-based Message Authentication Reporting and Conformance ...
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How many IPv6 IP addresses are there?
IPv6 uses a 128-bit address which allows for 2128 , or approximately 3.4 x 1038 addresses. 3.4 x ...
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What do I need to know about sending from shared and dedicated IPs?
An important decision you have to make as an email marketer is whether to send your email from de...
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What is the d= field in DomainKeys Identified Mail (DKIM)?
The d= field in DomainKeys Identified Mail (DKIM) is the domain of the entity signing the email m...
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What is FCrDNS and what are the requirements?
Forward Confirmed Reverse DNS (FCrDNS) is a DNS technical configuration that shows a relationship...
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Should I continue to use DomainKeys?
When DomainKeys Identified Mail (DKIM) was put into practice, it made the use of DomainKeys obsol...
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What factors influence how many IP addresses I need for my email marketing program?
Determining how many IP addresses your email marketing program needs can be difficult. Whether or...
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How do I make sure my host names clearly identify my sending identity?
Sender host names must clearly identify their sending identity. When scaling your Mail Transfer A...
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What are the rules for email address syntax?
For an email to be delivered, it must have a valid address that follows certain rules of syntax. ...