mail

var (
	ErrActionAborted = &smtp.SMTPError{
		Code:         451,
		EnhancedCode: smtp.EnhancedCode{4, 5, 1},
		Message:      "Action aborted: Local error in processing",
	}
	ErrMailboxUnavailable = &smtp.SMTPError{
		Code:         550,
		EnhancedCode: smtp.EnhancedCode{5, 5, 0},
		Message:      "Requested action not taken: mailbox unavailable",
	}
	ErrBadSequence = &smtp.SMTPError{
		Code:         503,
		EnhancedCode: smtp.EnhancedCode{5, 0, 3},
		Message:      "Bad sequence of commands",
	}
)