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smtpsrv: Send enhanced status codes

SMTP supports enhanced status codes, which help with
internationalization and accessibility in cases where protocol errors
make their way to the users.

This patch makes chasquid include these extended status codes in the
corresponding replies, as well as advertising support in the EHLO reply.

Main references:
- RFC 3463 (https://tools.ietf.org/html/rfc3463)
- RFC 2034 (https://tools.ietf.org/html/rfc2034)
- SMTP Enhanced Status Codes Registry
  (https://www.iana.org/assignments/smtp-enhanced-status-codes/smtp-enhanced-status-codes.xhtml)
This commit is contained in:
Alberto Bertogli
2019-01-09 23:43:11 +00:00
parent 78937aca93
commit e7309a2c7b
9 changed files with 78 additions and 81 deletions

View File

@@ -8,7 +8,7 @@ c -> MAIL FROM:<test@testy.com>
c <~ 250
c -> RCPT LALA: <>
c <- 500 unknown command
c <- 500 5.5.2 Unknown command
c -> RCPT TO:
c <~ 500
@@ -17,10 +17,10 @@ c -> RCPT TO:<pepe>
c <~ 501
c -> RCPT TO:<a@xn--->
c <- 501 malformed address (IDNA conversion failed)
c <- 501 5.1.2 Malformed destination domain (IDNA conversion failed)
c -> RCPT TO:<henryⅣ@testserver>
c <- 550 recipient invalid, please check the address for typos
c <- 550 5.1.3 Destination address is invalid
c -> RCPT TO:<aaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaXaaaa5aaaaX@bbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbXbbbb5bbbbX>
c <- 501 address too long
c <- 501 5.1.3 Destination address too long