OS3 | SMTP | FTP

202001.

    internet is             3,970,693,888
    inbound smtp hosts are  13,427,404
    iprev are               4,748,264
    unique iprev are        4,737,722
    no ssl are              3,988,657
    wrong CN/SAN are        512,806
    iprev CN/SAN are        246,801
    valid chains are        167,034

    0.34% of the public network listens on port 25/tcp - 13427404 out of 3970693888
    35.36% of the smtp servers are full-circle reverse DNS - 4748264 out of 13427404
    0.22% of those iprev hosts are multi-homed (round-robin) - 10542 out of 4748264
    16.00% of full-circle hosts talk SSL/STARTTLS - 759607 out of 4748264
    32.49% of SSL-enabled hosts advertise an iprev subject alternative name - 246801 out of 759607
    67.68% of SAN hosts have a valid certificate chain - 167034 out of 246801

    IPREV PTRs                      4,737,722
    Deferenced domains              976,781
    MX records                      632,793

    Total results for enforce check 585,638
    Unreachable MXen                104,381
    No STARTTLS                     132,386
    Offers STARTTLS                 334,501
    Enforces STARTTLS               628

    Trusted certificate chain       163,733 (ok)
    Cipher is (NONE)                123,388 (ok)
    From the future                 28 (certificate is not yet valid)
    Expired                         28,389 (certificate has expired)
    Self-signed                     61,894 (self signed certificate)
    Self-signed CA                  6,687 (self signed certificate in certificate chain)
    Untrusted certificate chain     478 (unable to get local issuer certificate)
    Invalid certificate             53,874 (unable to verify the first certificate)
    Wrong purpose certificate       499 (unsupported certificate purpose)
    TLSA records                    1,746
    Valid PKIX/DANE-EE              1,387
    Valid PKIX/DANE-TA              103

    64.00% of deferenced domains have an MX record
    25.00% of MX certificates are valid
    19.00% of MX end-points do not offer STARTTLS
    4.00% of MX certificates are expired
    9.00% of MX certificates are self-signed
    0.00% of MX certificates are private
    8.00% of MX certificates are invalid
    0.00% of MX end-points have a DANE record
    0.00% of MX end-points validating DANE (trusted, private and self-signed)

OS3 | SMTP | FTP | xhtml/css
Innopolis University