Mail Security & Deliverability Checker

Free online tools to test SPF, DKIM, DMARC, MX records, DNS blacklists, reverse DNS and SMTP/STARTTLS. Run a one-click Mail Security Check, get a 0–10 score with per-record findings and download a shareable PDF report.

Mail Security Anti-Spoof Inbound Health MX SPF DMARC DKIM DNS PTR Blacklist SMTP Relay WHOIS Headers

All DNS records for gmail.com

A (1)

Array
(
    [0] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 300
            [type] => A
            [ip] => 172.217.22.37
        )

)

AAAA (1)

Array
(
    [0] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 300
            [type] => AAAA
            [ipv6] => 2a00:1450:4007:816::2005
        )

)

MX (5)

Array
(
    [0] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 2307
            [type] => MX
            [pri] => 5
            [target] => gmail-smtp-in.l.google.com
        )

    [1] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 2307
            [type] => MX
            [pri] => 40
            [target] => alt4.gmail-smtp-in.l.google.com
        )

    [2] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 2307
            [type] => MX
            [pri] => 30
            [target] => alt3.gmail-smtp-in.l.google.com
        )

    [3] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 2307
            [type] => MX
            [pri] => 10
            [target] => alt1.gmail-smtp-in.l.google.com
        )

    [4] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 2307
            [type] => MX
            [pri] => 20
            [target] => alt2.gmail-smtp-in.l.google.com
        )

)

NS (4)

Array
(
    [0] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 21600
            [type] => NS
            [target] => ns1.google.com
        )

    [1] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 21600
            [type] => NS
            [target] => ns4.google.com
        )

    [2] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 21600
            [type] => NS
            [target] => ns3.google.com
        )

    [3] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 21600
            [type] => NS
            [target] => ns2.google.com
        )

)

TXT (4)

Array
(
    [0] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 300
            [type] => TXT
            [txt] => v=spf1 redirect=_spf.google.com
            [entries] => Array
                (
                    [0] => v=spf1 redirect=_spf.google.com
                )

        )

    [1] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 300
            [type] => TXT
            [txt] => yahoo-verification-key=dKYwfVbaxatmcXiXy6LDAxMRirqpOq5tj98iJv9qWVk=
            [entries] => Array
                (
                    [0] => yahoo-verification-key=dKYwfVbaxatmcXiXy6LDAxMRirqpOq5tj98iJv9qWVk=
                )

        )

    [2] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 300
            [type] => TXT
            [txt] => yahoo-verification-key=+eZwIPSgRxkAUzDtqT8Qhk+j4A1JF6V/wtGoyGTkELY=
            [entries] => Array
                (
                    [0] => yahoo-verification-key=+eZwIPSgRxkAUzDtqT8Qhk+j4A1JF6V/wtGoyGTkELY=
                )

        )

    [3] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 300
            [type] => TXT
            [txt] => globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=
            [entries] => Array
                (
                    [0] => globalsign-smime-dv=CDYX+XFHUw2wml6/Gb8+59BsH31KzUr6c1l2BPvqKX8=
                )

        )

)

CNAME (0)

No records.

SOA (1)

Array
(
    [0] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 60
            [type] => SOA
            [mname] => ns1.google.com
            [rname] => dns-admin.google.com
            [serial] => 926589918
            [refresh] => 900
            [retry] => 900
            [expire] => 1800
            [minimum-ttl] => 60
        )

)

CAA (1)

Array
(
    [0] => Array
        (
            [host] => gmail.com
            [class] => IN
            [ttl] => 21600
            [type] => CAA
            [flags] => 0
            [tag] => issue
            [value] => pki.goog
        )

)

SRV (0)

No records.