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)
123 B
123 B