$ python3 otp.py sample_mail security@example.com
(from security@example.com, 2026-10-04T18:30:00+00:00, 02_new.eml)
482916
[exit 0]

$ python3 otp.py sample_mail Security@Example.com
(from security@example.com, 2026-10-04T18:30:00+00:00, 02_new.eml)
482916
[exit 0]

$ python3 otp.py sample_mail orders@shop.example.org
(from orders@shop.example.org, 2026-10-05T08:00:00+00:00, 03_other.eml)
777777
[exit 0]

$ python3 otp.py sample_mail nobody@nowhere.example
no code found: no mail from nobody@nowhere.example
[exit 1]

$ python3 otp.py sample_mail security@examp1e.com
rejected: security@examp1e.com looks like security@example.com but is not the same address
[exit 3]

$ python3 otp.py sample_mail security@example.co
rejected: security@example.co looks like security@example.com but is not the same address
[exit 3]

$ python3 otp.py sample_mail security@exаmple.com
rejected: 'security@exаmple.com' is not a plain ASCII address (possible lookalike characters)
[exit 3]

