Good, with 2 things to fix

steamserver.net scored 80/100 (grade B). The main issues are no DKIM key found for the common selectors and DMARC alignment: DKIM alignment is unlikely under adkim=s.

Checked 2026-10-04 02:04 UTC · fresh check

1 passed2 need attention0 failing5 for information

All checks

MXCan servers find your inbox?Only one MX hostInfo

Info: Only one MX host
All mail for steamserver.net goes to smtp.steampowered.com. Most hosted providers make that one name highly available; if you run your own server, consider a backup MX.

SPFWho may send as you?No issues foundPass

Nothing to report.

DKIMAre your emails signed?No DKIM key found for the common selectorsNeeds attention

Warning: No DKIM key found for the common selectors
None of the 47 selectors probed under steamserver.net publish a DKIM key. DNS cannot list selectors, so a key under a custom selector may exist: find the s= value in the DKIM-Signature header of a message you sent and check that selector. If DKIM is not set up, enable it at each service that sends mail for steamserver.net.

DMARCWhat happens to fakes?DMARC uses strict alignmentInfo

Info: DMARC uses strict alignment
With adkim=s or aspf=s the DKIM d= domain or the bounce domain must equal the From domain exactly; a subdomain is not enough. Third-party senders that sign or bounce from a subdomain (or their own domain) will then fail DMARC unless they are configured to use your exact domain.

AlignmentDoes it match your From?DKIM alignment is unlikely under adkim=sNeeds attention

Warning: DKIM alignment is unlikely under adkim=s
This is a heuristic. No DKIM key was found at steamserver.net under the selectors we probed, and adkim=s requires the signing d= domain to equal steamserver.net exactly. If your mail is signed with a provider's domain or a subdomain, DKIM will not align. A key may exist under a selector we did not try; send a test message to confirm.

BIMICan inboxes show your logo?No BIMI recordInfo

Info: No BIMI record
No BIMI record at default._bimi.steamserver.net. BIMI is optional: it shows your logo next to your mail in supporting inboxes once DMARC is enforced.
How to fix this

MTA-STSIs mail to you encrypted?No MTA-STS recordInfo

Info: No MTA-STS record
No MTA-STS record at _mta-sts.steamserver.net. MTA-STS (RFC 8461) makes sending servers require TLS and a valid certificate when delivering to you, which blocks downgrade attacks.
How to fix this

TLS-RPTWill you hear about failures?No TLS-RPT recordInfo

Info: No TLS-RPT record
No TLS reporting record at _smtp._tls.steamserver.net. TLS-RPT (RFC 8460) tells senders where to send daily reports about failed encrypted deliveries to you.
How to fix this

How to fix it

Publish the MTA-STS recordTXT

Tells sending servers that steamserver.net publishes an MTA-STS policy at https://mta-sts.steamserver.net/.well-known/mta-sts.txt. Change the id whenever the policy file changes.

TypeTXT

Name / Host

_mta-sts.steamserver.net

Some DNS providers want just “_mta-sts” here.

Value

v=STSv1; id=202610040204

Host the MTA-STS policy filepolicy-file

Serve this file over HTTPS with a valid certificate for mta-sts.steamserver.net. It lists your MX hosts and starts in testing mode; switch to mode: enforce once TLS-RPT reports show no failures.

Location

https://mta-sts.steamserver.net/.well-known/mta-sts.txt

Contents

version: STSv1
mode: testing
mx: smtp.steampowered.com
max_age: 604800

Set up a TLS report addressinstruction

Sending servers will report TLS failures when delivering to steamserver.net, which you need before enforcing MTA-STS. The address must accept TLS reports; a DMARC report address does not necessarily do so.

Applies to: _smtp._tls.steamserver.net

Pick an address that will receive TLS reports: a mailbox you read (for example tls-reports@steamserver.net, created first) or a TLS reporting service. 2. Publish a TXT record at _smtp._tls.steamserver.net with the value v=TLSRPTv1; rua=mailto:<that address>.

Prepare BIMIinstruction

BIMI shows your logo next to messages in supporting inboxes, but only for mail that passes DMARC under an enforced policy.

Applies to: default._bimi.steamserver.net

Enforce DMARC first: p=quarantine or p=reject at 100% (no pct below 100). 2. Convert your logo to an SVG Tiny PS file and host it over HTTPS, for example https://steamserver.net/bimi/logo.svg. 3. For Gmail and Apple Mail, obtain a VMC or CMC certificate for the logo. 4. Publish a TXT record at default._bimi.steamserver.net with v=BIMI1, l= set to the logo URL and a= set to the certificate URL.