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A comment on Tell HN: Fastmail is leaking internal routing email address/username with teams.

Re:Tell HN: Fastmail is leaking internal routing email addre... by nickphx on Friday October 06, 2023 @01:15PM (#37793408)
If I understand this correctly.. someone that you communicate with via e-mail may potentially see your username for the email provider you're sending mail from? Why is that an issue?
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Re:Tell HN: Fastmail is leaking internal routing email addre... by aendruk on Friday October 06, 2023 @01:39PM (#37793681)
I may send mail as a pseudonym but log in to Fastmail using my full name.
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Re:Tell HN: Fastmail is leaking internal routing email addre... by dewey on Friday October 06, 2023 @03:34PM (#37795182)
That sounds like a process where it's very easy to slip up and if that's something to be concerned about in your threat model maybe you should not be doing that in the first place.
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Re:Tell HN: Fastmail is leaking internal routing email addre... by layer8 on Friday October 06, 2023 @04:55PM (#37796311)
They can now phish you using your Fastmail username.
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Re:Tell HN: Fastmail is leaking internal routing email addre... by throwawayfm on Friday October 06, 2023 @05:26PM (#37796647)
If "[email protected]" internally is sent to [email protected], people will know. If it's sent to [email protected], your personal email address, name, and login are leaked.
[ Parent | on HN ]