A
Scanned 1 hour ago. Re-scan for a fresh result after a fix.
Issues to fix
- warnMX host mail.guerrillamail.com (178.162.170.166) has no PTR record, many receivers reject senders without reverse DNS.→
- warnPartial bulk-sender setup, missing DKIM. Gmail/Yahoo and Microsoft require all three for 5,000+ messages/day.→
- warnAll MX hosts resolve to a single IP, no address-level redundancy.→
- warnpct=100 is deprecated in DMARCbis, apply the policy to all mail.→
- warnNo TLS-RPT reporting address. TLS delivery failures go unreported.→
Results
01Mail exchangers (MX)A
pass
1 MX record(s) found.
records
| preference | exchange | ttl |
|---|---|---|
| 0 | mail.guerrillamail.com | 300 |
info
Only one MX host, a secondary MX adds delivery resilience.
warn
All MX hosts resolve to a single IP, no address-level redundancy.
ip 178.162.170.166
02Mail providerA
info
Mail is handled by guerrillamail.com, a self-hosted or independent provider.
provider guerrillamail.com
03SPFA
pass
SPF record present.
record v=spf1 mx a ip4:168.119.142.36 ip6:2a01:4f8:251:657:0:0:0:2 -all
pass
SPF uses 2 of the 10 permitted DNS lookups.
lookups 2
pass
-all default policy.
04DKIMA
info
No DKIM selector found via common probes (a _domainkey subtree exists but no common selector matched), the domain may use a custom selector.
05DMARCA
pass
DMARC record present.
record v=DMARC1; p=reject; sp=reject; rf=afrf; pct=100; ri=86400
pass
Enforcing policy p=reject.
warn
pct=100 is deprecated in DMARCbis, apply the policy to all mail.
06DNS healthA
warn
MX host mail.guerrillamail.com (178.162.170.166) has no PTR record, many receivers reject senders without reverse DNS.
host mail.guerrillamail.com
ip 178.162.170.166
pass
2 nameservers published.
count 2
pass
SOA timers are sane.
mname rick.ns.cloudflare.com.
rname dns.cloudflare.com.
refresh 10000
retry 2400
expire 604800
minimum 1800
info
Zone is not DNSSEC-signed.
07BlacklistsA
pass
178.162.170.166 is not listed on SpamCop.
target 178.162.170.166
list SpamCop
pass
178.162.170.166 is not listed on PSBL.
target 178.162.170.166
list PSBL
pass
178.162.170.166 is not listed on Spamhaus ZEN.
target 178.162.170.166
list Spamhaus ZEN
pass
guerrillamail.com is not listed on Spamhaus ZRD.
target guerrillamail.com
list Spamhaus ZRD
pass
guerrillamail.com is not listed on Spamhaus DBL.
target guerrillamail.com
list Spamhaus DBL
pass
178.162.170.166 is not listed on Spamhaus AuthBL.
target 178.162.170.166
list Spamhaus AuthBL
pass
178.162.170.166 is not listed on GBUdb Truncate.
target 178.162.170.166
list GBUdb Truncate
08Bulk sending readinessA
warn
Partial bulk-sender setup, missing DKIM. Gmail/Yahoo and Microsoft require all three for 5,000+ messages/day.
spf true
dkim false
dmarc true
threshold 5,000 messages/day
info
One-click List-Unsubscribe is a message-level header. Verify by sending a test message.
09TLSA
info
No DANE/TLSA records. DANE is not deployed for these mail servers.
hosts mail.guerrillamail.com
10MTA-STSA
11BIMIA
info
No BIMI record. No brand logo is published for inboxes with BIMI support.
BIMI draft
About this report
This report grades the email and DNS setup of guerrillamail.com against the relevant RFCs. Each check links to the standard behind the rule. A high grade means the common causes of spoofing and poor deliverability are covered. A grade is not a guarantee that every message reaches the inbox.
Frequently asked questions
What does the grade mean?
The grade summarizes how completely the domain implements the core email authentication and DNS standards. A and B mean the main protections (SPF, DKIM, DMARC, valid MX) are in place. Lower grades flag gaps that make spoofing easier or hurt deliverability. A missing MX record caps the grade at F, a weak SPF all-qualifier caps at D, and no DMARC caps at C.
How fresh is this report?
A report is a snapshot from when it was last scanned, kept as a shareable link. If you are fixing your setup, use the Re-scan button to run every check live again.
Why is the SMTP section still loading?
The live SMTP probe connects to the mail servers from a dedicated prober, which takes a few seconds and runs separately from the DNS checks. The results stream in when ready. If SMTP was not requested for this report, that section stays empty.
I own this domain and want to stop scan.mx checking it.
Domain owners can block scanning by publishing a DNS TXT record; see the opt-out page.