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add comment about not verifying Sender for submissions

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Mechiel Lukkien 2023-08-10 12:18:05 +02:00
parent 6b68920a3a
commit 7cceb3d834
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1 changed files with 2 additions and 0 deletions
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smtpserver/server.go
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@ -1659,6 +1659,8 @@ func (c *conn) submit(ctx context.Context, recvHdrFor func(string) string, msgWr
// Check that user is only sending email as one of its configured identities. Not
// for other users.
// We don't check the Sender field, there is no expectation of verification, ../rfc/7489:2948
// and with Resent headers it seems valid to have someone else as Sender. ../rfc/5322:1578
msgFrom, header, err := message.From(dataFile)
if err != nil {
metricSubmission.WithLabelValues("badmessage").Inc()