Nobody uses an image smaller than 10ko on signature, its not realistic.

Its Work now with this instruction ! Yes, thanks. 😊 

This (zimbraMailSignatureMaxLength) is COS or account only attribute. You could check it on a test account first and then if you want you could apply it on COS level too. To implement it on the COS level the command structure is same as previous reference:

su - zextras
carbonio prov mc default zimbraMailSignatureMaxLength 524288

# carbonio prov mc COS_NAME zimbraMailSignatureMaxLength 524288

Though this does not require any service restart, but feel free to refresh your browser.

Let us know how it goes.

Thanks for the report. The error about exceeding the signature size limit is the zimbraMailSignatureMaxLength cap kicking in. It defaults to 10240 bytes per signature.

Could you please try this and let us know the results:

su - zextras
carbonio prov ma user@example.com zimbraMailSignatureMaxLength 524288

@victorsina

The screenshot-not-appearing-on-destination is likely a separate issue.

The only way to workaround the issue is to use an webserver and publish there the signatures, then insert the signatures urls for every user.

Now we have other problems with screenshots in mails. No screenshots appears on destination for every mail created ussing webmail.

We have a new problem with Carbonio Release 26.3.2 (Network Edition AND Community, same problem)

It's currently impossible to insert an image with basic copy/past into an email signature.

The error is:
One or more signatures have exceeded the size limit.

I deleted all the signatures and created a new one, but the problem persists.

Any ideas ?