4 results for tags
spf x
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MX Lookup Tool - Check your DNS MX Records online - MxToolbox
Sat Oct 21 09:36:02 2023 - permalink -- https://mxtoolbox.com/
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Vermeiden, dass E-Mails an Gmail-Nutzer blockiert oder an den Spamordner gesendet werden - Gmail-Hilfe
Mon Jul 25 12:40:18 2022 - permalink -- https://support.google.com/mail/answer/81126
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Sender Policy Framework - Wikipedia
Sat Aug 17 23:20:16 2019 - permalink -- https://en.wikipedia.org/wiki/Sender_Policy_Framework
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RFC 4408 - Sender Policy Framework (SPF) for Authorizing Use of Domains in E-Mail, Version 1
Thu Oct 1 12:13:31 2015 - permalink -- http://tools.ietf.org/html/rfc4408