lmz-bw.de

Checked 21 October 2026, 23:20 UTC · via 8.8.8.8
!Passed with warnings
24 passed 4 warnings 0 failed 4 info

SPF

pass

SPF record published

Found

Record
v=spf1 mx ip4:88.99.223.27 ip4:89.146.234.130 ip4:62.146.8.31 ip4:92.205.196.5 ip4:193.196.128.254 ip4:89.19.228.100 ip4:89.19.228.101 ip4:89.19.228.77 ip4:188.40.58.247 ip4:5.35.234.234 ip4:195.66.99.135 ip4:62.75.247.44 ip4:212.227.89.57 ip4:217.160.226.166 ip4:82.165.193.1 ip4:85.25.144.9 ip4:54.194.192.132 ip4:87.79.30.25 ip4:87.79.30.30 ip4:91.217.141.0/24 ip4:195.34.176.144/28 ip4:195.34.183.168/29 ip4:89.146.242.9 ip4:195.34.176.148 ip4:195.34.176.149 ip6:2a01:130:195::34:183:160/123 ip6:2a01:130:8495:1002::1002 ip6:2a01:130:8495:1002::1003 ip6:2a01:130:8495:1002::/64 ip4:5.35.225.0/24 ip4:5.35.226.0/24 ip4:5.35.232.0/22 ip4:5.175.14.0/24 ip4:50.63.8.0/22 ip4:52.26.164.15/32 ip4:52.89.65.132/32 ip4:54.184.82.65/32 ip4:54.214.222.76/32 ip4:68.178.181.0/24 ip4:68.178.213.0/24 ip4:68.178.252.0/24 ip4:72.167.168.0/24 ip4:72.167.172.0/24 ip4:72.167.218.0/24 ip4:72.167.234.0/24 ip4:72.167.238.0/24 ip4:80.67.16.0/20 ip4:80.237.130.0/24 ip4:80.237.132.0/23 ip4:80.237.137.0/24 ip4:80.237.138.0/24 ip4:83.169.24.0/21 ip4:87.230.40.0/21 ip4:87.230.60.0/22 ip4:87.230.104.0/22 ip4:91.216.90.0/24 ip4:91.250.64.0/21 ip4:92.51.170.64/27 ip4:92.204.65.0/28 ip4:92.204.71.0/24 ip4:92.204.81.0/24 ip4:97.74.135.0/24 ip4:132.148.124.0/24 ip4:134.119.224.0/19 ip4:173.201.192.0/23 ip4:176.28.32.0/21 ip4:178.77.80.0/21 ip4:178.77.104.0/21 ip4:178.77.112.0/21 ip4:182.50.132.0/24 ip4:184.168.128.0/24 ip4:184.168.131.0/24 ip4:184.168.200.0/24 ip4:184.168.224.0/24 ip4:188.121.52.0/24 ip4:188.121.53.0/24 ip4:198.71.224.0/19 ip4:208.109.80.0/24 ip4:208.109.194.0/24 ip4:216.69.139.0/24 ip4:193.196.128.220 a:mail01.fwu.de ip6:2a00:1158:400:1::/120 include:spf.protection.outlook.com include:_spf.belwue.de include:sendgrid.net include:_spf1.mailgun.org include:_spf2.mailgun.org include:_spf.eu.mailgun.org include:spf.crsend.com ip4:5.35.234.0/24 -all
DNS lookups
10 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 10 of 10 DNS lookups #2
    SPF record needs 10 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.lmz-bw.de)

Found

Record
v=DMARC1; p=quarantine; rua=mailto:mail-security@lmz-bw.de;ruf=mailto:mail-security@lmz-bw.de;
Found at
_dmarc.lmz-bw.de
TagValueMeaning
vDMARC1Version
pquarantinePolicy
ruamailto:mail-security@lmz-bw.deAggregate report addresses
rufmailto:mail-security@lmz-bw.deFailure 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:mail-security@lmz-bw.de
  • ✓ Subdomain policy: quarantine #20
    Subdomains are covered by policy 'quarantine'.
  • ✓ Report addresses in own domain #29
    All report addresses are in your own organizational domain.

DKIM

warn

Selectors: email, selector1, selector2, s1, s2

Found

Selectors
email, selector1, selector2, s1, s2
_domainkey
NOERROR
SelectorKeyFlags
emailRSA 1024 bits
selector1RSA 1024 bits
selector2RSA 1024 bits
s1RSA 2048 bits
s2RSA 1024 bits

Checks

  • ✓ Keys found: email, selector1, selector2, s1, s2 #7
    DKIM keys found for this domain with selectors: email, selector1, selector2, s1, s2
  • !
    1024-bit DKIM key
    1024-bit RSA keys are the minimum and are considered weak today: email (1024 bits), selector1 (1024 bits), selector2 (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

1 mail server

Found

PriorityHostRecordsReverse DNS
0lmzbw-de0i.mail.protection.outlook.comA 52.101.68.15 A 52.101.185.24 A 52.101.103.143 A 52.101.68.25 AAAA 2a01:111:f403:ca48::8 AAAA 2a01:111:f403:ca04::e AAAA 2a01:111:f403:ca04::a AAAA 2a01:111:f403:ca21::cmail-db6pr03cu00107.inbound.protection.outlook.com ✓ mail-zrxpr07cu00100.inbound.protection.outlook.com ✓ mail-miypr03cu00107.inbound.protection.outlook.com ✓ mail-db8pr02cu00101.inbound.protection.outlook.com ✓ mail-miypr02cu00100.inbound.protection.outlook.com ✓ mail-db8pr02cu00106.inbound.protection.outlook.com ✓ mail-du0pr03cu00102.inbound.protection.outlook.com ✓ mail-matpr04cu00204.inbound.protection.outlook.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.
  • ✓ All hosts have IPv6 #11
    All MX records resolve to IPv6 addresses.
  • !
    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 8 MX addresss have a PTR record that resolves back to them.

TLS

info

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

Found

DANE (TLSA records)

MX hostTLSADNSSEC
lmzbw-de0i.mail.protection.outlook.comnone-
Lookup error: DNS query for _mta-sts.lmz-bw.de failed: read udp 46.225.38.91:57828->8.8.8.8:53: i/o timeout

Checks

  • i
    Could not be checked
    The MTA-STS lookup failed, so this could not be checked: DNS query for _mta-sts.lmz-bw.de failed: read udp 46.225.38.91:57828->8.8.8.8:53: i/o timeout
    #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