Your company logo in webmail and Colabora

1. What it is and who can change it

The logo shows to the users of your domain after they sign in to webmail and Colabora, instead of the Lua logo.

• Who changes it: the administrator with access to the domain in the admin panel, and the Lua team. Regular users cannot.
• Cost: included in every plan, per domain, with no license and no charge.
• When it shows: after sign-in. The sign-in page keeps the Lua brand, because the person's domain is not known yet.
• Where it applies: in the Lua+ and Lua Next webmail themes and in Colabora. Only the logo changes: colors, theme, name and texts stay Lua's.

2. Image format and size

• Formats: PNG, JPEG or WEBP. SVG and GIF are not accepted. The admin panel checks the type from the file contents, not from the extension.
• Limits: up to 2 MB and up to 4000 × 4000 pixels.
• Automatic resizing: the admin panel scales the image down to fit the header (at most 640 × 128 pixels, double 320 × 64 for high-resolution screens) and never enlarges it.
• Ideal: a PNG or WEBP with a transparent background, in a nearly square format, from 1:1 up to 2:1 (width at most 2 times the height, such as 400 × 260 pixels), preferably with the version for dark backgrounds (chapter 4).

If the image is wider than 2:1, the admin panel shows the warning This logo is very wide and may be hard to read in the header. The warning does not block you: you can save anyway, but it is worth switching to a shorter version.

3. Step by step in the admin panel

1. Sign in to the admin panel and open Domains.
2. Click the domain and, in the tabs, click Configure domain (in the admin panel, Domain settings).
3. Find the Logo in webmail and Colabora card.
4. Under Logo (light theme), choose the file. The Webmail header preview shows how it will look, in the light and dark themes, before you save.
5. Click Save logo.

While the domain has no logo of its own, the card says webmail shows the Lua logo. The previews show the header with the Lua logo (default).

If the file is not accepted (wrong format, too large), the admin panel shows the reason and nothing is saved. After saving, the card shows Own logo in use, with the date and who updated it.

On a phone, the admin panel uses the same screen, with the fields and previews stacked one below the other.

4. Logo for the dark theme

The second field, Dark theme logo (optional), is for uploading a light version of the logo that looks good on a dark background. The header bar in webmail (Lua+ and Lua Next) and in Colabora is dark in both themes, so this version applies to both the light and the dark theme.

• With the dark theme logo: it shows in both themes, with no background.
• Without the dark theme logo: the domain logo shows on a rounded light background, in both themes (light and dark), so it does not disappear on the dark bar.

To remove only the dark theme logo, check Remove the dark theme logo and save.

5. How it looks in webmail and Colabora

The logo shows in the top left corner after sign-in, in webmail and in Colabora. The header bar is dark in both themes (light and dark), and the rule is the same in both. The crops below are of the header, with fictional test logos.

In the webmail

Webmail crops (version 1.6), enlarged. The header is the same in the Lua+ and Lua Next themes.

In Colabora

Colabora uses the same logo and the same rule, in the top header. Colabora crops, on the computer and on the phone, with test logos.

The webmail and Colabora sign-in page keeps the Lua brand.

How long it takes

The logo shows at the next sign-in. People who already have webmail open see it within about 10 minutes.

6. Change or remove the logo

• Change: choose a new file in the same card and click Save logo.
• Remove: click Remove the logo and go back to Lua's and confirm. Webmail goes back to showing the Lua logo for the domain's mailboxes, and you can upload the logo again whenever you want.

7. Domain logo vs. white label

If your company uses its own address with white label, the domain logo replaces only the header logo after sign-in. The rest of the brand (name, colors, theme, symbol and support) stays the same, and the sign-in page at that address keeps the white label logo.

They are different things, with different image rules: the domain logo refuses GIF; the full whitelabel accepts GIF. To learn about the whitelabel and preview your company's brand, see Your logo in webmail and Colabora (full brand); the upload steps are in the panel manual, and the DNS steps (without them the addresses do not open) are in Set up the DNS. When you confirm the brand, the addresses are turned on by themselves and, once they are ready, the domain administrators get an email.

8. Frequently asked questions