No basic test for mailbox availability? (Very obvious false valid)



  • Hi,
    I just tried a test email and was surprised that it returns valid, even though a very basic self written test would identify it as invalid, as the mailbox is not available.
    Why does't this easy one fail and report accordingly?
    Best

    Array ( [0] => test.testmann@t-online.de )
    Array
    (
        [mx01.t-online.de] => 10
        [mx02.t-online.de] => 10
        [mx03.t-online.de] => 10
        [mx00.t-online.de] => 10
        [t-online.de] => 0
    )
    try mx01.t-online.de:25
    <<< 220-mailin87.aul.t-online.de T-Online ESMTP receiver fssmtpd2025 ready.
    220 T-Online ESMTP receiver ready.
    >>> HELO test123456.de
    <<< 250 Ok.
    >>> MAIL FROM: <user@test123456.de>
    <<< 250 2.1.0 Sender accepted.
    >>> RCPT TO: <test.testmann@t-online.de>
    <<< 550-5.1.1 user unknown
    550 5.1.1 Unknown recipient.
    >>> RSET
    <<< 250 2.0.0 Ok.
    >>> quit
    <<< 221-2.0.0 mailin87.aul.t-online.de closing.
    221 2.0.0 Closing.
    test.testmann@t-online.de invalid.
    

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