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Flag providers that leak IP addresses of SMTP users in Received header #313

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link2xt opened this issue Oct 27, 2024 · 0 comments

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link2xt commented Oct 27, 2024

Some providers like Gmail leak IP addresses in Received headers: https://ylukem.com/blog/apple-mail-leaks-your-ip-address

Posteo, mailbox.org, mailo, yandex, outlook, fastmail, riseup and systemli do not leak IP address as far as I see from my mail archives.

Also all Mailcow and chatmail instances do not leak the IP.

Leaking providers: Gmail, web.de, 163.com, gmx.net.
icloud leaked in the past but this has since changed, need to be checked again.

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