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A comprehensive collection of questions and answers about email deliverability technical from email marketers, experts and technical documentation.
How do I find the postmaster contact email for freenet.de?
What is the typical DNS record length limit and what should I do if my provider has a smaller limit?
Do PTR records and HELOs impact email deliverability?
What are the options for dealing with overstuffed SPF records exceeding DNS lookup limits?
Does using different domains in From and Reply-To email addresses affect deliverability?
Does a parent domain need BIMI for subdomain BIMI to work?
What are the best tools and practices for consolidating SPF records?
What are the key differences between BIMI certificate vendors Entrust and DigiCert?
What are the implications of disabling TLS 1.0/1.1 for outgoing email and what alternatives are available?
How does Klaviyo handle domain authentication without SPF, DKIM, and DMARC records?
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