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SPF records SPF Record Syntax - DNS SPF – Hetzner DokuWiki SPF - TXT Record HOWTO – Define an SPF Record – ZYTRAX How To use an SPF Record to Prevent Spoofing & Improve E Sender-Authentifizierung mit Sender Policy Framework Sender Policy Framework – Wikipedia SPF Record Lookup - MxToolbox Create an SPF TXT record - Rackspace Support IN TXT v=spf1 a mx. Verhindern kann ein gesetzter SPF-Record den Versand solcher Mails nicht, er macht ihn aber für den Spammer unattraktiver, v=spf1: Identifies the TXT record as an SPF record, SPF clients ignore TXT records that do not start with the version string v=spf1 ABOUT SPF RECORDS. Sender Policy Framework (SPF) records allow domain owners to publish a list of IP addresses or subnets that are authorized to send email $ host -t TXT descriptive text v=spf1 ip4:/23 ip4: Damit konkurriert SPF mit anderen TXT-Records um den Create an SPF TXT record. Last Select TXT Record for the record type. Enter the rule in the Text area. For example, enter v=spf1 mx -all to indicate SPF record. In den DNS-Einstellungen der sendenden Domain können mit Hilfe eines SPF-records alle Server konfiguriert werden, die zum Versand von E-Mails @ IN TXT v=spf1 mx ip4: a: -all es sind alle Rechner, für die MX-Records in dieser Domäne existieren, gültig HOWTO - Define an SPF Record. defensive mail host SPF mail IN TXT v=spf1 a -all Notes: The SPF record states that the A record of SPF Record Syntax: Note: This page Suppose 's SPF record was v=spf1 a -all. The domain is expanded; a TXT lookup is performed. More Information About Txt Record. Using TXT records to contain SPF information was designed as a transitional mechanism v=spf1 a ip4: