LINUX.ORG.RU

История изменений

Исправление boowai, (текущая версия) :

https://tools.ietf.org/html/rfc5321#section-4.2.1

4yz
… in this category might have a different time value, but the SMTP client SHOULD try again.

По твоей логике MUST перекроет и

5yz … SMTP client SHOULD NOT repeat

Исходная версия boowai, :

https://tools.ietf.org/html/rfc5321#section-4.2.1

4yz
… in this category might have a different time value, but the SMTP client SHOULD try again.