O Google Apps já envia um erro 550 se você não tiver um endereço "pega-tudo" definido.
Aqui estão os resultados de uma mensagem que acabei de enviar para uma conta inválida em um domínio do Google Apps (example.org) da minha conta do Gmail. Os nomes foram alterados para proteger os culpados. O domínio está definido para "descartar".
Delivered-To: [email protected]
Received: by 10.216.45.139 with SMTP id p11cs30689web;
Tue, 21 Sep 2010 12:05:45 -0700 (PDT)
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Tue, 21 Sep 2010 12:05:44 -0700 (PDT)
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Received: by 10.216.176.83 with SMTP id a61mr12854859wem.47; Tue, 21 Sep 2010
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From: Mail Delivery Subsystem <[email protected]>
To: [email protected]
X-Failed-Recipients: [email protected]
Subject: Delivery Status Notification (Failure)
Message-ID: <[email protected]>
Date: Tue, 21 Sep 2010 19:05:44 +0000
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Delivery to the following recipient failed permanently:
[email protected]
Technical details of permanent failure:=20
Google tried to deliver your message, but it was rejected by the recipient
domain. We recommend contacting the other email provider for further inform
ation about the cause of this error. The error that the other server return
ed was: 550 550-5.1.1 The email account that you tried to reach does not ex
ist. Please try
550-5.1.1 double-checking the recipient's email address for typos or
550-5.1.1 unnecessary spaces. Learn more at
550 5.1.1 http://mail.google.com/support/bin/answer.py?answer=3D6596 p70si1
2864980weq.200 (state 14).
----- Original message -----
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ue,
21 Sep 2010 12:05:44 -0700 (PDT)
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Date: Tue, 21 Sep 2010 12:05:44 -0700
Message-ID: <[email protected]
>
Subject: invalid user test
From: Chris Francy <[email protected]>
To: [email protected]
Content-Type: text/plain; charset=3DISO-8859-1
invalid user test