Mail domain report: mobile.de

SPF

pass

SPF record published

Found

Record: v=spf1 mx ip4:91.211.75.0/24 ip4:194.50.69.0/24 ip6:2a04:cb41:f016:2::/64 ip6:2a04:cb41:a516:2::/64 a:mx1.hc2186-24.iphmx.com include:spf.ecgmail.cloud include:sendgrid.net ~all
DNS lookups: 6 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 6 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

pass

p=reject (_dmarc.mobile.de)

Found

Record: v=DMARC1; p=reject; pct=100; fo=1; ri=3600; rua=mailto:1551a0a1@inbox.ondmarc.com; ruf=mailto:1551a0a1@inbox.ondmarc.com;
Found at: _dmarc.mobile.de
External report address: mailto:1551a0a1@inbox.ondmarc.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:1551a0a1@inbox.ondmarc.com	Aggregate report addresses
ruf	mailto:1551a0a1@inbox.ondmarc.com	Failure report addresses
fo	1	Failure reporting options
ri	3600	Report interval (seconds)

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:1551a0a1@inbox.ondmarc.com
✓ Subdomain policy: reject #20

Subdomains are covered by policy 'reject'.
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

warn

No keys found under the checked selectors

Found

Selectors: None found
_domainkey: NOERROR

Checks

!

No key under common selectors

The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.

#7

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

1 mail server

Found

Priority	Host	Records	Reverse DNS
10	mx.sendgrid.net	A 34.198.67.24 A 15.222.160.229 A 16.52.61.209 A 18.224.101.244 A 44.245.249.202 A 3.17.120.38 A 16.52.110.174 A 3.136.245.72 A 52.37.49.26 A 13.216.54.185 A 52.25.213.239 A 44.216.124.122	ec2-34-198-67-24.compute-1.amazonaws.com ✓ ec2-15-222-160-229.ca-central-1.compute.amazonaws.com ✓ ec2-16-52-61-209.ca-central-1.compute.amazonaws.com ✓ ec2-18-224-101-244.us-east-2.compute.amazonaws.com ✓ ec2-44-245-249-202.us-west-2.compute.amazonaws.com ✓ ec2-3-17-120-38.us-east-2.compute.amazonaws.com ✓ ec2-16-52-110-174.ca-central-1.compute.amazonaws.com ✓ ec2-3-136-245-72.us-east-2.compute.amazonaws.com ✓ ec2-52-37-49-26.us-west-2.compute.amazonaws.com ✓ ec2-13-216-54-185.compute-1.amazonaws.com ✓ ec2-52-25-213-239.us-west-2.compute.amazonaws.com ✓ ec2-44-216-124-122.compute-1.amazonaws.com ✓

Checks

✓ 1 MX record #9

Found 1 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: mx.sendgrid.net

#11
!

Single MX host, no backup

Only one MX record found. For better email reliability, consider adding at least one backup MX server.

#12
✓ At most 5 MX records #13

Found 1 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 12 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 1 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
mx.sendgrid.net	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