symbaloo.com

Checked 22 October 2026, 10:53 UTC · via 8.8.8.8
✗Problems found
23 passed 3 warnings 2 failed 3 info

SPF

fail

SPF record published

Found

Record
v=spf1 mx a ip4:87.233.242.240 ip4:85.17.118.219 ip4:87.233.165.0/24 include:user.zohobookings.eu include:eu.zcsend.net include:amazonses.com include:one.zoho.eu include:mailer.trainercentral.eu include:_spf.google.com ~all
DNS lookups
13 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✗
    13 DNS lookups, over the limit of 10
    SPF record needs 13 DNS lookups (including nested includes), more than the limit of 10. Receivers will return a permerror; reduce includes or flatten the record.
    #2
  • ✓ 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

fail

p=none (_dmarc.symbaloo.com)

Found

Record
v=DMARC1; p=none;rua=mailto:dmarc-rua@symbaloo.com
Found at
_dmarc.symbaloo.com
TagValueMeaning
vDMARC1Version
pnonePolicy
ruamailto:dmarc-rua@symbaloo.comAggregate report addresses

Checks

  • ✗
    Policy: none (monitoring only)
    DMARC policy is set to 'none', which only monitors but doesn't protect against spoofing. Consider upgrading to 'quarantine' or ideally 'reject'.
    #4
  • ✓ Record published #5
    DMARC record exists for this domain.
  • ✓ Valid syntax #17
    DMARC record syntax is valid.
  • ✓ Aggregate reports enabled #19
    Aggregate reports are sent to: mailto:dmarc-rua@symbaloo.com
  • ✓ Report addresses in own domain #29
    All report addresses are in your own organizational domain.

DKIM

warn

Selectors: mail, google

Found

Selectors
mail, google
_domainkey
NOERROR
SelectorKeyFlags
mailRSA 1024 bits
googleRSA 2048 bits

Checks

  • ✓ Keys found: mail, google #7
    DKIM keys found for this domain with selectors: mail, google
  • !
    1024-bit DKIM key
    1024-bit RSA keys are the minimum and are considered weak today: mail (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

pass

Signed, DS published at parent

Found

DNSKEY records
Yes (3)
DS at parent
Yes
Algorithms
RSASHA256 (8)
Key tags
43833, 62295, 27829
Signatures valid until
5 November 2026, 00:00 UTC

Checks

  • ✓ Signed, DS published at parent #8
    DNSSEC is enabled for this domain (DNSKEY and DS present), providing additional security for DNS lookups.
  • ✓ Signatures valid until 2026-11-05 #21
    DNSKEY signatures are valid until 2026-11-05T00:00:00Z.

MX

warn

3 mail servers

Found

PriorityHostRecordsReverse DNS
10mx.spamexperts.comA 149.13.75.27 AAAA 2001:978:2:7::162:100fe1-r3-in.fra02.l.antispamcloud.com ✓ fe1-r3-in.fra02.l.antispamcloud.com ✓
20fallbackmx.spamexperts.euA 154.59.104.23 A 149.13.75.27 A 154.59.193.124 AAAA 2001:978:2:6::f:124 AAAA 2001:978:2:2c::137:100 AAAA 2001:978:2:7::162:100fe2-r3-in.ams14.l.antispamcloud.com ✓ fe1-r3-in.fra02.l.antispamcloud.com ✓ fe3-r3-in.du01.l.antispamcloud.com ✓ fe3-r3-in.du01.l.antispamcloud.com ✓ fe2-r3-in.ams14.l.antispamcloud.com ✓ fe1-r3-in.fra02.l.antispamcloud.com ✓
30lastmx.spamexperts.netA 38.71.16.244 A 154.59.104.23 A 38.89.254.156 A 149.13.75.27 AAAA 2001:978:2:7::162:100 AAAA 2001:550:2:61::2fc:100 AAAA 2001:550:2:3::62:100 AAAA 2001:978:2:2c::137:100fe2-r2-in.la10.l.antispamcloud.com ✓ fe2-r3-in.ams14.l.antispamcloud.com ✓ fe1-r2-in.ch03.l.antispamcloud.com ✓ fe1-r3-in.fra02.l.antispamcloud.com ✓ fe1-r3-in.fra02.l.antispamcloud.com ✓ no PTR fe2-r2-in.la10.l.antispamcloud.com ✓ fe2-r3-in.ams14.l.antispamcloud.com ✓

Checks

  • ✓ 3 MX records #9
    Found 3 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 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.
  • !
    Addresses without reverse DNS
    These MX addresses have no PTR record, which many receivers treat as a spam signal: 2001:550:2:61::2fc:100 (lastmx.spamexperts.net). Ask your hosting provider to set one.
    #30

TLS

warn

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

Found

DANE (TLSA records)

MX hostTLSADNSSEC
mx.spamexperts.comnone-
fallbackmx.spamexperts.eunone-
lastmx.spamexperts.netnone-

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