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Re: [cobalt-security] SMTP Auth - from address

Subject: Re: [cobalt-security] SMTP Auth - from address
From: Glen Scott <glen@xxxxxxxxxxxxxxxxxxxx>
Date: Wed, 20 Jun 2001 09:43:19 +0100
List-id: Mailing list for users to address network security on Cobalt products. <cobalt-security.list.cobalt.com>

Does SMTP authorization check a user's from address before sending email?
I'd like to make it impossible from someone with relay priviledges on my
SMTP server to send email with forged "from" address. Is there a way to do
this?

Yes, sendmail checks whether the domain in the from field is anactual domain name, and will reject anything that isn't with a"sender domain must exist" error. At least, this is how sendmail isset up on our RaQ2 and RaQ3.


Regards,

Glen

Follow-Ups:
- Re: [cobalt-security] SMTP Auth - from address
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References:
- [cobalt-security] RaQ4-All-Security Release 1.0.2-5-9769
  - From: Achieve Website Design
- Re: [cobalt-security] RaQ4-All-Security Release 1.0.2-5-9769
  - From: Alex Collins
- Re: [cobalt-security] RaQ4-All-Security Release 1.0.2-5-9769
  - From: Carrie Bartkowiak
- Re: [cobalt-security] RaQ4-All-Security Release 1.0.2-5-9769
  - From: MikeM
- Re: [cobalt-security] RaQ4-All-Security Release 1.0.2-5-9769
  - From: Alex Collins
- Re: [cobalt-security] RaQ4-All-Security Release 1.0.2-5-9769
  - From: MikeM
- Re: [cobalt-security] RaQ4-All-Security Release 1.0.2-5-9769
  - From: Alex Collins
- [cobalt-security] SMTP Auth - from address
  - From: Kevin D

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