[GSoC PATCH v9 0/2] send-email: improve error capture and status code handling

This patch series improves SMTP authentication error handling.

Auth relied solely on return values without capturing exceptions, misjudging non-credential errors as authentication failures.

Patch v9 1/2 wraps the auth process in an eval {} block to catch all exceptions, adds var error for future handling, and var result to return auth state.

Patch v9 2/2 introduces finer-grained SMTP error handling by extracting status codes per RFC 5321. For 4yz (transient) errors, return 1 and allow retries; for 5yz (permanent) errors, return 0. Unrecognized or uncaught status codes are treated as transient errors (return 1). If no error is present and no result is defined, return 1 as a transient error; otherwise, return the authentication result.

 Zheng Yuting (2):
  send-email: capture errors in an eval {} block
  send-email: finer-grained SMTP error handling

 git-send-email.perl | 69 +++++++++++++++++++++++++++++++++++----------
 1 file changed, 54 insertions(+), 15 deletions(-)

-- 2.49.0