Mail domain report: semrush.com

SPF

pass

SPF record published

Found

Record: v=spf1 mx include:_spf.google.com include:usb._netblocks.mimecast.com include:spf.mandrillapp.com include:mktomail.com include:_spf.salesforce.com include:mail.zendesk.com include:amazonses.com ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8.0/21 ip4:192.243.55.0/24 ip4:85.208.98.64/32 ip4:198.2.128.158/32 ip4:54.240.126.194/32 ip4:54.240.126.195/32 ip4:54.240.126.196/32 ip4:192.174.84.107/32 ip4:192.174.84.108/30 ip4:192.174.84.112/28 ip4:192.174.84.128/25 ip4:147.253.214.240/30 ip4:149.72.61.106/32 ip4:149.72.151.35/32 ip4:149.72.201.153/32 ip4:149.72.22.42/32 ip4:149.72.183.8/32 ip4:159.183.141.212/30 -all
DNS lookups: 9 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 9 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.semrush.com)

Found

Record: v=DMARC1; p=quarantine; pct=100; rua=mailto:xoqtbrm5@ag.us.dmarcian.com, mailto:service_dmarc_reports@semrush.com; ruf=mailto:service_dmarc_reports@semrush.com; adkim=r; aspf=r; fo=1; sp=quarantine;
Found at: _dmarc.semrush.com
External report address: mailto:xoqtbrm5@ag.us.dmarcian.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	quarantine	Policy
sp	quarantine	Subdomain policy
pct	100	Percentage of mail the policy applies to
rua	mailto:xoqtbrm5@ag.us.dmarcian.com, mailto:service_dmarc_reports@semrush.com	Aggregate report addresses
ruf	mailto:service_dmarc_reports@semrush.com	Failure report addresses
adkim	r	DKIM alignment (r = relaxed, s = strict)
aspf	r	SPF alignment (r = relaxed, s = strict)
fo	1	Failure reporting options

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:xoqtbrm5@ag.us.dmarcian.com, mailto:service_dmarc_reports@semrush.com
✓ 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: mail, k1, google, mx, s1, s2

Found

Selectors: mail, k1, google, mx, s1, s2
_domainkey: NOERROR

Selector	Key	Flags
mail	RSA 1024 bits
k1	RSA 1024 bits
google	RSA 1024 bits
mx	RSA 1024 bits
s1	RSA 2048 bits
s2	RSA 1024 bits

Checks

✓ Keys found: mail, k1, google, mx, s1, s2 #7

DKIM keys found for this domain with selectors: mail, k1, google, mx, s1, s2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits), k1 (1024 bits), google (1024 bits), mx (1024 bits), s2 (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

2 mail servers

Found

Priority	Host	Records	Reverse DNS
5	usb-smtp-inbound-1.mimecast.com	A 170.10.152.242 A 170.10.150.242	usb-smtp-delivery-2.mimecast.com ✓ usb-smtp-delivery-2.mimecast.com ✓
5	usb-smtp-inbound-2.mimecast.com	A 170.10.150.242 A 170.10.152.242	usb-smtp-delivery-2.mimecast.com ✓ usb-smtp-delivery-2.mimecast.com ✓

Checks

✓ 2 MX records #9

Found 2 MX records for this domain.
✓ All hosts resolve #10

All MX records resolve to valid IP addresses.
!

Hosts without IPv6

The following MX hosts could not be resolved to IPv6 addresses: usb-smtp-inbound-1.mimecast.com, usb-smtp-inbound-2.mimecast.com

#11
✓ Redundant MX hosts #12

Found 2 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 2 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 4 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 2 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
usb-smtp-inbound-1.mimecast.com	none	-
usb-smtp-inbound-2.mimecast.com	none	-

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