Excellent, with 1 thing to fix

opera.com scored 92/100 (grade A). The main issue is DKIM key shorter than 2048 bits. Detected senders: Google Workspace.

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

3 passed1 needs attention0 failing4 for informationDetected senders: Google Workspace

All checks

MXCan servers find your inbox?No issues foundPass

Nothing to report.

SPFWho may send as you?SPF ends in softfail (~all)Info

Info: SPF ends in softfail (~all)
"~all" is common and works well with DMARC. "-all" is stricter; switch when you are sure every sender is listed.

DKIMAre your emails signed?DKIM key shorter than 2048 bitsNeeds attention

Warning: DKIM key shorter than 2048 bits
mail (1024-bit) uses an RSA key below 2048 bits. Short keys can be factored and some receivers treat them as weak. Rotate to a 2048-bit key at your sending provider.
Pass: DKIM key published
opera.com publishes a DKIM key under google, mail.

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?No issues foundPass

Nothing to report.

BIMICan inboxes show your logo?No BIMI recordInfo

Info: No BIMI record
No BIMI record at default._bimi.opera.com. 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.opera.com. 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?TLS-RPT is configuredPass

Pass: TLS-RPT is configured
TLS reports will be sent to mailto:c22187dc@in.mailhardener.com.

How to fix it

Publish the MTA-STS recordTXT

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

TypeTXT

Name / Host

_mta-sts.opera.com

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

Value

v=STSv1; id=202610040202

Host the MTA-STS policy filepolicy-file

Serve this file over HTTPS with a valid certificate for mta-sts.opera.com. 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.opera.com/.well-known/mta-sts.txt

Contents

version: STSv1
mode: testing
mx: aspmx.l.google.com
mx: alt1.aspmx.l.google.com
mx: alt2.aspmx.l.google.com
mx: alt3.aspmx.l.google.com
mx: alt4.aspmx.l.google.com
max_age: 604800

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.opera.com

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://opera.com/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.opera.com with v=BIMI1, l= set to the logo URL and a= set to the certificate URL.