mox/testdata/smtpsmuggle/domains.conf

Domains:
	mox.example: nil
Accounts:
	mjl:
		Domain: mox.example
		Destinations:
			mjl@mox.example: nil
add faq for smtp smuggling, fix bug around handling "\nX\n" for any X, reject bare carriage returns and possibly smtp-smuggling attempts mox was already strict in its "\r\n.\r\n" handling for end-of-message in an smtp transaction. due to a mostly unrelated bug, sequences of "\nX\n", including "\n.\n" were rejected with a "local processing error". the sequence "\r\n.\n" dropped the dot, not necessarily a big problem, this is unlikely to happen in a legimate transaction and the behaviour not unreasonable. we take this opportunity to reject all bare \r. we detect all slightly incorrect combinations of "\r\n.\r\n" with an error mentioning smtp smuggling, in part to appease the tools checking for it. smtp errors are 500 "bad syntax", and mention smtp smuggling. 2024-01-01 20:30:31 +03:00			`Domains:`
			`mox.example: nil`
			`Accounts:`
			`mjl:`
			`Domain: mox.example`
			`Destinations:`
			`mjl@mox.example: nil`