{"id":2133,"date":"2026-02-24T12:27:03","date_gmt":"2026-02-24T11:27:03","guid":{"rendered":"https:\/\/woodpecker.co\/blog\/?p=2133"},"modified":"2026-08-03T13:09:55","modified_gmt":"2026-08-03T12:09:55","slug":"spf-dkim","status":"publish","type":"post","link":"https:\/\/woodpecker.co\/blog\/spf-dkim\/","title":{"rendered":"What Is SPF, DKIM & DMARC? (+ How to Set Them Up in 2026)"},"content":{"rendered":"

SPF, DKIM and DMARC are email authentication protocols that prove messages are connected to the domain they claim to represent. Together, they reduce domain spoofing, give receiving servers more information about legitimate mail and support reliable email delivery.<\/span><\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Element<\/th>\nStandard business email<\/th>\nCold email<\/th>\n<\/tr>\n<\/thead>\n
Subject line<\/td>\nStates the topic or requested action<\/td>\nEstablishes relevant context without clickbait<\/td>\n<\/tr>\n
Greeting<\/td>\nMatches the existing relationship<\/td>\nUses the prospect\u2019s name<\/td>\n<\/tr>\n
Opening<\/td>\nRefers to shared work or an earlier conversation<\/td>\nShows why this particular person was contacted<\/td>\n<\/tr>\n
Body<\/td>\nProvides the necessary details<\/td>\nConnects one problem or goal to a concise value proposition<\/td>\n<\/tr>\n
CTA<\/td>\nRequests a specific action<\/td>\nAsks one low-friction question<\/td>\n<\/tr>\n
Signature<\/td>\nMay include full contact details<\/td>\nRemains short and credible<\/td>\n<\/tr>\n
Length<\/td>\nDepends on the context<\/td>\nUsually shorter than standard correspondence<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

In short, SPF checks the sending source, DKIM verifies a message signature, and DMARC connects those checks to the domain recipients see.<\/span><\/p>\n

TL;DR<\/b><\/h3>\n