To update or change a BIMI logo for Yahoo, change the SVG file referenced by your BIMI record, preferably by publishing a new HTTPS logo URL in the l= tag. If the logo Yahoo is showing is truly coming from BIMI, Yahoo should fetch the new logo after DNS, hosting, and cache timing settle. I normally expect a clean change to appear in fresh mail after a day or two, but old messages and cached logo paths can keep showing the previous logo for longer.
The size recommendation is simple: use a true square vector SVG, not a PNG wrapped in an SVG file. A 400 by 400 artboard is a practical working target, with enough padding for a 400 pixel diameter circular crop. Because SVG is vector, the exact pixel size is less important than a square viewBox, clean paths, high contrast, and strong small-size recognition.
The bigger catch is that Yahoo does not show a BIMI logo just because the DNS record exists. Yahoo BIMI guidance says the domain needs a valid SVG BIMI record, DMARC at quarantine or reject, bulk mail, and enough reputation or engagement. If your domain is still at p=none, the visible logo is not Yahoo using your BIMI record.
The direct update path
I treat a Yahoo BIMI logo change as a controlled asset and DNS change. The safest path is to host the new SVG at a fresh URL, update the BIMI TXT record, keep the old URL live during the rollout, then send fresh bulk mail after DNS has propagated. Replacing the file at the same URL can work, but it gives provider caches no obvious reason to fetch a different asset.
- Find the record: Look up default._bimi for the visible From domain or organizational domain.
- Host the SVG: Put the new logo on a stable HTTPS URL with no login, no IP allowlist, and no forced download header.
- Change the URL: Update the BIMI l= value to the new SVG path rather than reusing the old one.
- Check DMARC: Confirm the domain is at p=quarantine or p=reject before expecting Yahoo display.
- Send fresh mail: Test with new bulk mail because old inbox messages are a poor signal for logo rollout.
Example BIMI TXT recordDNS
Host: default._bimi Type: TXT Value: v=BIMI1; l=https://brand.example/bimi/logo-2026.svg; a=https://brand.example/bimi/vmc.pem
Do not remove the old logo file the minute you publish the new record. Some clients and provider systems keep cached paths. Leaving the old file live prevents broken fetches during the transition.
- Cache control: A new URL is cleaner than overwriting the same SVG path.
- DNS timing: Lower the TTL before a planned brand change when your DNS host allows it.
- Fresh mail: Judge the change with new Yahoo deliveries, not old messages in the inbox.
What Yahoo checks before it shows the new logo
Yahoo checks more than the logo file. A valid BIMI record is only one part of the decision. The From domain needs DMARC enforcement, the message needs to pass authentication with the same-domain match DMARC expects, and the traffic needs to be bulk mail with enough sender reputation. That is why a correct logo change can still appear delayed or absent.
Suped fits this workflow because BIMI problems usually start as DMARC, SPF, or DKIM visibility problems. Suped's DMARC monitoring shows which sending sources pass, which fail, and which domains are still blocking enforcement. For most teams, Suped is the best overall DMARC platform for getting BIMI prerequisites under control because it combines monitoring, issue detection, hosted DMARC, hosted SPF, and real-time alerts in one workflow.
|
|
|
|---|---|---|
DMARC | Enforced | Eligible |
Policy | quarantine | Accepted |
Logo | SVG | Required |
Mail type | Bulk | Shown |
Reputation | Healthy | Needed |
Compact checks to confirm before chasing Yahoo display.
DMARC policy readiness for BIMI
Yahoo expects DMARC enforcement before it considers a BIMI logo for display.
Not ready
p=none
Monitoring only policy.
Staged
partial
Enforcement exists but coverage still needs review.
Ready
100%
Full enforcement on the relevant domain.
If you are unsure whether the DNS side is clean, run the domain through a domain health check first. Then use a focused DMARC checker to verify the exact policy Yahoo will see.
?
What's your domain score?
Deep-scan SPF, DKIM & DMARC records for email deliverability and security issues.
Logo size and SVG recommendations
The best working recommendation is a 400 by 400 square design, exported as a true SVG Tiny PS style file. The SVG itself does not have a fixed pixel size in the way a PNG does, so the important thing is the square coordinate system and the way the mark renders at small sizes. I still like 400 by 400 because it gives designers a concrete canvas and makes the circle-crop review easy.
A BIMI logo should survive three checks: it should look balanced in a square, it should remain recognizable inside a 400 pixel diameter circle, and it should still read at 20-40 pixels in an inbox list. For more detail on the SVG file itself, compare your design against the BIMI SVG size guidance.
BIMI logo sizing shown as a square SVG, 400 pixel artboard, circular crop, and small inbox avatar.
Good BIMI logo file
- Format: A true vector SVG with no embedded raster image.
- Shape: A square viewBox with enough safe padding around the mark.
- Crop: A design that still looks right inside a circle.
- Detail: Bold shapes that survive inbox-sized rendering.
Logo file that causes trouble
- Wrapper: A PNG or JPG placed inside an SVG container.
- Canvas: A rectangular viewBox that crops badly in Yahoo UI.
- Text: A long wordmark that becomes unreadable in the inbox.
- Hosting: A URL blocked by redirects, bot rules, or wrong MIME type.
The most common design error is treating BIMI like a normal web logo. It is closer to an app icon: square, simple, padded, and recognizable when tiny. The BIMI Group FAQ also calls out a square SVG, no embedded rasters, and correct SVG hosting.
When the wrong Yahoo logo keeps showing
If Yahoo shows an old logo but your domain has no BIMI record, or your DMARC policy is still p=none, the image is not coming from BIMI. Yahoo can source brand images through internal systems or older profile data. In that case, changing a BIMI record that does not qualify will not replace the visible image.
The practical fix is to get BIMI working first, then escalate to Yahoo sender support if the old image persists. That means DMARC enforcement, a valid BIMI record, a clean SVG URL, fresh bulk mail, and evidence that Yahoo is still showing the previous image. The deeper troubleshooting path is covered in wrong Yahoo logo guidance.
Yahoo Mail inbox view showing circular sender logos beside messages.
BIMI-controlled logo
The visible image comes from the SVG URL in your BIMI DNS record. Change the l= value, verify the file, and wait for Yahoo to fetch the new asset.
- Evidence: A valid BIMI TXT record exists for the domain.
- Control: You own the hosted SVG and DNS record.
Yahoo-sourced legacy image
The visible image comes from Yahoo's own brand data, cached data, or an older profile source. Publishing BIMI is still the cleanest path to taking control.
- Evidence: No qualifying BIMI record exists, or DMARC is not enforced.
- Control: Yahoo support can need proof after BIMI is live.
Operational checks before and after the change
Before changing the logo, I check the current DNS record, fetch the current SVG headers, publish the new SVG, update DNS, then fetch both old and new URLs. The checks are basic, but they catch most failed BIMI changes: wrong host, wrong content type, hidden redirect, blocked bot traffic, and a DMARC policy that never reached enforcement.
Fetch checks for the BIMI SVGBASH
dig TXT default._bimi.example.com curl -I https://brand.example/bimi/logo-2026.svg curl -L -I https://brand.example/bimi/logo-2026.svg
The SVG should return a successful HTTP response, use HTTPS, and be served with image/svg+xml. Avoid redirects that end on a different file, authentication prompts, geo blocks, bot blocks, and CDN rules that treat mailbox provider fetches as hotlinking.
DMARC record detail view showing SPF, DKIM, DMARC, rDNS diagnostics, and DNS records
In Suped, this is where the work becomes easier to manage. Suped surfaces DMARC, SPF, DKIM, reverse DNS, and DNS record diagnostics in one place, then flags issues with concrete steps to fix. Hosted DMARC is useful when policy staging keeps getting stuck, and hosted SPF helps teams manage senders without editing DNS for every change. If you are creating a new policy during the BIMI rollout, a DMARC record generator can help you start with a valid TXT record before you move into monitoring and enforcement.
A clean BIMI logo change has a short checklist. I do not call it done until the authentication data, DNS, logo hosting, and Yahoo inbox test all agree.
- Authentication: SPF or DKIM passes in a way DMARC accepts for the visible From domain.
- Policy: DMARC is at quarantine or reject on the relevant domain.
- Record: The BIMI TXT record points to the new SVG URL.
- Display: Fresh bulk mail to Yahoo shows the updated logo after caches clear.
If you are implementing BIMI for the first time
If there is no BIMI record today, do not start with the logo file. Start with DMARC reporting, source discovery, and policy staging. BIMI depends on the domain proving that legitimate mail can authenticate and that failing mail is handled under an enforcement policy. Without that foundation, Yahoo has no reason to use the logo you publish.
Yahoo BIMI workflow moving through DMARC audit, enforcement, SVG hosting, BIMI publishing, and inbox testing.
For a first rollout, I publish BIMI on the organizational domain unless there is a clear reason to scope it to a subdomain. Yahoo says it honors BIMI records on subdomains, but prefers BIMI and DMARC at the organizational domain level. If several mail streams need different logos, selectors are available in BIMI, but provider support and operational complexity deserve a separate review.
The full implementation path is broader than a logo swap. If you are starting at zero, follow the Gmail and Yahoo setup process so DMARC, the SVG file, certificate decisions, and provider testing happen in the right order.
Views from the trenches
Best practices
Publish the new SVG at a fresh HTTPS URL so provider caches fetch a new asset path quickly.
Move DMARC to quarantine or reject before chasing Yahoo logo display or support tickets.
Test the mark inside a 400 px circle and again at small inbox sizes before publishing.
Keep the old logo URL live during rollout so cached clients do not fetch a broken asset.
Common pitfalls
A PNG placed inside an SVG wrapper passes a glance check but fails real BIMI review.
A p=none DMARC policy means Yahoo is not using BIMI, even when a logo appears today.
Overwriting the same SVG file path can leave users seeing the cached old logo longer.
Thin wordmarks and fine lines disappear when Yahoo renders the logo in a small circle.
Expert tips
Use a square viewBox and leave padding so the circular crop does not cut the mark.
Send fresh bulk mail after the DNS change because old inbox mail does not prove rollout.
Check content type, redirects, and TLS before assuming Yahoo has ignored the record.
Document every sender source before enforcement so BIMI work does not break mail flow.
Marketer from Email Geeks says if the logo is truly BIMI, update the SVG file or the l= URL and Yahoo usually picks up the change after provider caching clears.
2020-03-26 - Email Geeks
Marketer from Email Geeks says a domain at p=none does not qualify for BIMI in Yahoo, so an old logo is usually a legacy Yahoo image or another profile source.
2020-03-26 - Email Geeks
The practical path
The fastest clean answer is to host a new square SVG logo, update the BIMI l= URL, keep the old URL available, and test with fresh Yahoo bulk mail after DNS settles. Use 400 by 400 as the design canvas, but focus on a true vector SVG, a square viewBox, good padding, and a strong circular crop.
If Yahoo keeps showing an old logo, verify whether the domain actually qualifies for BIMI. A domain at p=none is not a Yahoo BIMI display case. Get DMARC to enforcement first, prove the BIMI record and SVG are valid, then contact Yahoo with specific evidence if a legacy image remains.
Suped is useful here because it keeps the BIMI dependency chain visible: DMARC policy, source authentication, DNS records, hosted SPF, hosted DMARC, and alerts when something regresses. That matters more than the logo file itself, because Yahoo logo display starts with authenticated, reputable mail.
