Allowing From all aliasses possible?

[Jelle Langbroek]

Hi,

My users are able to send From any mailaddress/domain they want. They can setup another From address (alias) in an email-client and send mail with that. Is this normal behaviour for a default Nethserver install? How can I prevent users from doing this?

Thanks.

Best,
Jelle

[Filippo Carletti]

A "free" mail From address is the default behavior. I've experimented
with reject_authenticated_sender_login_mismatch, but I still don't
have a prototype ready for testing.
I'm not sure to make reject... the default, what do you think?

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Ciao,
Filippo

[Jelle Langbroek]

I really think reject should be the default behaviour. When multiple users use the mailserver, it's a matter of time until antispam services pickup your IP address and you'll be blocklisted because your mailserver is being abused with fake accounts.

I think the admin should be 'in control' and assign email addresses / aliasses to the users that they can use.

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