tbs.com

Checked 22 October 2026, 10:55 UTC · via 8.8.8.8
!Passed with warnings
23 passed 6 warnings 0 failed 3 info

SPF

pass

SPF record published

Found

Record
v=spf1 include:tbs.com._nspf.vali.email include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all
DNS lookups
2 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 2 of 10 DNS lookups #2
    SPF record needs 2 DNS lookups (limit is 10).
  • ✓ Ends with ~all #3
    SPF record properly uses ~all to restrict unauthorized senders.
  • ✓ Record published #6
    SPF record exists for this domain.
  • ✓ Single record #16
    Exactly one SPF record is published.
  • ✓ Valid syntax #25
    All SPF mechanisms and modifiers are valid.
  • ✓ No void lookups #26
    All include/redirect targets exist.
  • ✓ No overly broad IP ranges #27
    All ip4/ip6 ranges are narrow enough.

DMARC

warn

p=quarantine (_dmarc.tbs.com)

Found

Record
v=DMARC1; p=quarantine; rua=mailto:dmarc_agg@vali.email; ruf=mailto:NzMz@ruf.vali.email
Found at
_dmarc.tbs.com
External report address
mailto:dmarc_agg@vali.email (authorized)
External report address
mailto:NzMz@ruf.vali.email (authorized)
TagValueMeaning
vDMARC1Version
pquarantinePolicy
ruamailto:dmarc_agg@vali.emailAggregate report addresses
rufmailto:NzMz@ruf.vali.emailFailure report addresses

Checks

  • !
    Policy: quarantine
    DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.
    #4
  • ✓ Record published #5
    DMARC record exists for this domain.
  • ✓ Valid syntax #17
    DMARC record syntax is valid.
  • ✓ Applies to 100% of mail #18
    DMARC policy applies to all failing mail.
  • ✓ Aggregate reports enabled #19
    Aggregate reports are sent to: mailto:dmarc_agg@vali.email
  • ✓ Subdomain policy: quarantine #20
    Subdomains are covered by policy 'quarantine'.
  • ✓ External report addresses authorized #29
    Report addresses in other domains have published their authorization.

DKIM

warn

Selectors: k1, selector1

Found

Selectors
k1, selector1
_domainkey
NOERROR
SelectorKeyFlags
k1RSA 1024 bits
selector1RSA 2048 bits

Checks

  • ✓ Keys found: k1, selector1 #7
    DKIM keys found for this domain with selectors: k1, selector1
  • !
    1024-bit DKIM key
    1024-bit RSA keys are the minimum and are considered weak today: k1 (1024 bits). Rotate to a 2048-bit key.
    #23
  • ✓ No problematic flags #24
    No keys in test mode, revoked, or limited to SHA-1.

DNSSEC

warn

Not signed

Found

DNSKEY records
No (0)
DS at parent
No

Checks

  • !
    Not enabled
    DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.
    #8

MX

warn

3 mail servers

Found

PriorityHostRecordsReverse DNS
10tbs-com.mail.protection.outlook.comA 52.101.8.71 A 52.101.9.11 A 52.101.41.4 A 52.101.42.64 AAAA 2a01:111:f403:c95d::4 AAAA 2a01:111:f403:f802::2 AAAA 2a01:111:f403:f90a::4 AAAA 2a01:111:f403:c902::5mail-dm2pr03cu00107.inbound.protection.outlook.com ✓ mail-bl1pr02cu00103.inbound.protection.outlook.com ✓ mail-sj2pr05cu00204.inbound.protection.outlook.com ✓ mail-mw2pr05cu00100.inbound.protection.outlook.com ✓ mail-ph6pr04cu00104.inbound.protection.outlook.com ✓ mail-sj2pr05cu00202.inbound.protection.outlook.com ✓ mail-bnypr04cu00104.inbound.protection.outlook.com ✓ mail-sj2pr05cu00505.inbound.protection.outlook.com ✓
20mxa-00241e02.gslb.pphosted.com(does not resolve)
20mxb-00241e02.gslb.pphosted.com(does not resolve)

Checks

  • ✓ 3 MX records #9
    Found 3 MX records for this domain.
  • !
    Hosts without IP addresses
    The following MX hosts could not be resolved to IP addresses: mxa-00241e02.gslb.pphosted.com, mxb-00241e02.gslb.pphosted.com
    #10
  • !
    Hosts without IPv6
    The following MX hosts could not be resolved to IPv6 addresses: mxa-00241e02.gslb.pphosted.com, mxb-00241e02.gslb.pphosted.com
    #11
  • ✓ Redundant MX hosts #12
    Found 3 MX records, which provides redundancy for email delivery.
  • ✓ At most 5 MX records #13
    Found 3 MX records, which is within the recommended range (1-5).
  • ✓ No localhost targets #14
    No MX records pointing to localhost found.
  • ✓ No private IP addresses #15
    No MX records resolving to private IP addresses found.
  • ✓ No CNAME targets #22
    No MX records point to a CNAME.
  • ✓ Reverse DNS confirmed #30
    All 8 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 3 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
tbs-com.mail.protection.outlook.comnone-
mxa-00241e02.gslb.pphosted.comnone-
mxb-00241e02.gslb.pphosted.comnone-

Checks

  • !
    Not configured
    MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.
    #32
  • i
    Not configured
    TLS-RPT lets senders report TLS delivery problems to you. It is most useful together with MTA-STS or DANE.
    #35
  • i
    Not used
    No MX host publishes TLSA records. DANE lets senders verify your mail server's certificate through DNSSEC; it requires DNSSEC on the MX host's zone.
    #36

BIMI

info

No BIMI record

Checks

  • i
    Not configured
    BIMI shows your logo next to your mail in supporting mail clients. It requires DMARC enforcement.
    #38