Mail domain report: mxtoolbox.com

SPF

info

SPF record published

Found

Record: v=spf1 redirect=mxtoolbox.com.hosted.spf-report.com
DNS lookups: 7 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

No ptr mechanism found in SPF record.
✓ 7 of 10 DNS lookups #2

SPF record needs 7 DNS lookups (limit is 10).
i

Delegated via redirect

SPF record has no 'all' mechanism but redirects to mxtoolbox.com.hosted.spf-report.com, whose policy applies.

#3
✓ 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=reject (_dmarc.mxtoolbox.com)

Found

Record: v=DMARC1; p=reject; rua=mailto:634990a7@mxtoolbox.dmarc-report.com,mailto:634990a7@mxtoolbox.dmarc-report.net; ruf=mailto:634990a7@forensics.dmarc-report.com,mailto:634990a7@forensics.dmarc-report.net; fo=1; pct=100
Found at: _dmarc.mxtoolbox.com
External report address: mailto:634990a7@mxtoolbox.dmarc-report.com (authorized)
External report address: mailto:634990a7@mxtoolbox.dmarc-report.net (authorized)
External report address: mailto:634990a7@forensics.dmarc-report.com (authorized)
External report address: mailto:634990a7@forensics.dmarc-report.net (not authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:634990a7@mxtoolbox.dmarc-report.com,mailto:634990a7@mxtoolbox.dmarc-report.net	Aggregate report addresses
ruf	mailto:634990a7@forensics.dmarc-report.com,mailto:634990a7@forensics.dmarc-report.net	Failure report addresses
fo	1	Failure reporting options

Checks

✓ Policy: reject #4

DMARC policy is set to 'reject', which provides the strongest protection against email spoofing.
✓ 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:634990a7@mxtoolbox.dmarc-report.com, mailto:634990a7@mxtoolbox.dmarc-report.net
✓ Subdomain policy: reject #20

Subdomains are covered by policy 'reject'.
!

Report address not authorized

These report addresses are in another domain that has not agreed to receive your reports, so receivers will not send them: mailto:634990a7@forensics.dmarc-report.net (needs mxtoolbox.com._report._dmarc.forensics.dmarc-report.net). Ask the report provider to publish the record, or check the address.

#29

DKIM

warn

Selectors: selector1, selector2, google

Found

Selectors: selector1, selector2, google
_domainkey: NXDOMAIN

Selector	Key	Flags
selector1	RSA 1024 bits
selector2	RSA 2048 bits
google	RSA 1024 bits

Checks

✓ Keys found: selector1, selector2, google #7

DKIM keys found for this domain with selectors: selector1, selector2, google
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: selector1 (1024 bits), google (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

pass

5 mail servers

Found

Priority	Host	Records	Reverse DNS
0	aspmx.l.google.com	A 142.251.127.26 AAAA 2a00:1450:4001:c21::1a	lcfrai-in-f26.1e100.net ✓ lcfrai-in-f26.1e100.net ✓
5	alt1.aspmx.l.google.com	A 142.250.147.27 AAAA 2a00:1450:4025:c01::1b	rd-in-f27.1e100.net ✓ rd-in-f27.1e100.net ✓
5	alt2.aspmx.l.google.com	A 172.253.152.27 AAAA 2a00:1450:4010:c22::1b	yulpptr-in-f27.1e100.net ✓ yulpptr-in-f27.1e100.net ✓
10	aspmx2.googlemail.com	A 142.250.147.27 AAAA 2a00:1450:4025:c01::1b	rd-in-f27.1e100.net ✓ rd-in-f27.1e100.net ✓
10	aspmx3.googlemail.com	A 172.253.152.27 AAAA 2a00:1450:4010:c22::1b	yulpptr-in-f27.1e100.net ✓ yulpptr-in-f27.1e100.net ✓

Checks

✓ 5 MX records #9

Found 5 MX records for this domain.
✓ All hosts resolve #10

All MX records resolve to valid IP addresses.
✓ All hosts have IPv6 #11

All MX records resolve to IPv6 addresses.
✓ Redundant MX hosts #12

Found 5 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 5 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 10 MX addresss have a PTR record that resolves back to them.

TLS

warn

MTA-STS testing · TLS-RPT · DANE on 0 of 5 MX hosts

Found

MTA-STS record: v=STSv1; id=20211220;
Policy URL: https://mta-sts.mxtoolbox.com/.well-known/mta-sts.txt
Mode: testing
Allowed MX: alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, aspmx.l.google.com, aspmx2.googlemail.com, aspmx3.googlemail.com
Max age: 86400 seconds
TLS-RPT record: v=TLSRPTv1;rua=mailto:tlsrpt@mxtoolbox.com

DANE (TLSA records)

MX host	TLSA	DNSSEC
aspmx.l.google.com	none	-
alt1.aspmx.l.google.com	none	-
alt2.aspmx.l.google.com	none	-
aspmx2.googlemail.com	none	-
aspmx3.googlemail.com	none	-

Checks

✓ Record published #32

MTA-STS record found with id 20211220.
!

Policy in testing mode

With mode: testing, senders only report TLS problems (via TLS-RPT) and still deliver without TLS. Switch to mode: enforce once reports are clean.

#33
✓ All MX hosts covered #34

Every MX host matches an mx: line of the MTA-STS policy.
✓ Reports enabled #35

TLS reports are sent to: mailto:tlsrpt@mxtoolbox.com
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

pass

https://images.bimi-report.com/mxtoolbox.com.svg

Found

Record: v=BIMI1; l=https://images.bimi-report.com/mxtoolbox.com.svg; a=https://images.bimi-report.com/mxtoolbox.com.certificate.pem
Found at: default._bimi.mxtoolbox.com
Logo: https://images.bimi-report.com/mxtoolbox.com.svg
Certificate: https://images.bimi-report.com/mxtoolbox.com.certificate.pem

Checks

✓ Logo and certificate published #38

BIMI logo: https://images.bimi-report.com/mxtoolbox.com.svg; certificate: https://images.bimi-report.com/mxtoolbox.com.certificate.pem
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.