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RFC 8314 (SMTP MTA Strict Transport Security) recommends moving away from port 465 and switching to STARTTLS on port 587 for secure mail delivery.
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`.well-known` ([RFC](https://tools.ietf.org/html/rfc8615)) is becoming an increasingly popular destination for stashing site-wide metadata. Some of that metadata is relevant to site security or may un…
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https://datatracker.ietf.org/doc/draft-ietf-uta-mta-sts/
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Just as info:
Since some days MTA-STS has been officially published as [RFC 8461](https://tools.ietf.org/html/rfc8461)
MTA-STS (the full name SMTP Mail Transfer Agent Strict Transport Security) …
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MTA-STS is a new IETF standard that enables sending downgrade-resistant email over SMTP by piggybacking on the browser Certificate Authority model. Implementing this standard for Mail-in-a-Box would o…
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Might as well live in Cloudflare with the domain
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# EASM
Create a comment with any of the following templates for the tools and Github Actions would take it and trigger the corresponding application and return the results from the tool in a new comm…
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I just installed Sendmail 8.17.2 and postfix-mta-sts-resolver . I want to verity my setup, by sending to a site, which announces MTA-STS support but does not offer STARTTLS. The only site I found wa…
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I have been puzzled why mta-sts doesn't work.
[According to this](https://www.mailhardener.com/kb/mta-sts#how-mta-sts-works) you need:
- a _mta-sts TXT record in the format `v=STSv1; id=20190101T0…