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| Both sides previous revisionPrevious revisionNext revision | Previous revision |
| en:dmarc [2022/04/12 14:08] – fw | en:dmarc [2025/02/25 12:13] (current) – bk |
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| Basics can be found here: https://en.wikipedia.org/wiki/DMARC | Basics can be found here: https://en.wikipedia.org/wiki/DMARC |
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| There is a common problem which prevents DMARC from a widespread usage for a strict policy (policy=REJECT): Redirects can destroy the DMARC signature header. This happens with common groupware (Microsoft Exchange, Novell GroupWise,IBM Lotus Domino), with Sieve-rules and some free mail providern (some hotmail.xyz accounts and web.de). If you would use a strict REJECT policy, such addresses with active redirects could bounce your e-mail. The usage of a neutral policy (policy=NONE) has no disadvantages and may even give you some improvements in deliverability. | There is a common problem that prevents DMARC from widespread usage for a strict policy (policy=REJECT): Redirects can destroy the DMARC signature header. This happens with common groupware (Microsoft Exchange, Novell GroupWise,IBM Lotus Domino), with Sieve-rules and some free mail provider (some hotmail.xyz accounts and web.de). If you would use a strict REJECT policy, such addresses with active redirects could bounce your e-mail. The usage of a neutral policy (policy=NONE) has no disadvantages and may even give you some improvements in deliverability. |
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| | If you are a target of phishing attacks, we recommend a strict DMARC policy. |
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| promio.net will receive generated DMARC reports and plans to establish a DMARC monitor as part of promio.connect. | promio.net will receive generated DMARC reports and plans to establish a DMARC monitor as part of promio.connect. |
| If you send 100% of your e-mails with domain //example.com//, you can setup DMARC bei registering the following TXT record in your DNS for //_dmarc.example.com//: | If you send 100% of your e-mails with the domain //example.com//, you can set up DMARC by registering the following TXT record in your DNS for //_dmarc.example.com//: |
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| <code>v=DMARC1; p=none; sp=none; rua=mailto:dmarc_reports@promio.net; ruf=mailto:dmarc_reports@promio.net; pct=100</code> | <code>v=DMARC1; p=none; sp=none; rua=mailto:dmarc_reports@promio.net; ruf=mailto:dmarc_reports@promio.net; pct=100</code> |
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| {{tag> DMARC policy}} | {{tag> DMARC deliverability spam_filter}} |
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