How to fix BIMI

Fix or remove a malformed BIMI TXT record. BIMI is optional and never required for a healthy sender.

You got BIMI record is malformed. This is informational. BIMI does not affect whether Lumail will send, and it is not required for sender health.

A BIMI record is present at default._bimi.your-domain.com but it is not a valid v=BIMI1 record with an https logo URL.

What to change

Either:

Remove the default._bimi TXT if you are not using BIMI. The alert goes away.
Fix it to a valid record:

Type	Host	Value
TXT	`default._bimi`	`v=BIMI1; l=https://yourdomain.com/logo.svg`

The l= URL must be https, publicly reachable, and a SVG Tiny PS logo. Most senders also need a VMC before Gmail shows the logo. You can skip BIMI entirely.

Sender Health
How to add DMARC — BIMI is ignored without an enforced DMARC policy

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