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| [[https://byom.de| Trashmail beyom.de]]                                      | https://byom.de                              |
| [[https://www.kitterman.com/spf/validate.html|SPF Record Testing Tools]]     | https://www.kitterman.com/spf/validate.html  |
| [[https://www.spfwizard.net| SPF Generator Tool]]                            | https://www.spfwizard.net                    |
| [[https://emailstuff.org/| Email-Tools]]                                     | https://emailstuff.org/                      |
| [[https://barracudacentral.org/rbl|Barracuda Reputation Block List (BRBL)]]  | https://barracudacentral.org/rbl             |
| [[https://dnsblcheck.de/dnsbl|DNSBL Check]]                                  | https://dnsblcheck.de/dnsbl                  |
| [[https://sender.office.com| Microsoft IP Freischaltung]]                    | https://sender.office.com                    |
| [[https://www.mail-tester.com| Send Test-Email ]]                            | https://www.mail-tester.com/                 |
| [[https://www.winmaildat.com/| Winmail.dat dekodieren]]                      | https://www.winmaildat.com/                  |