Compatibility
Last reviewed August 15, 2026. SendArq treats preview, clipboard, Gmail editor, sent message, and recipient rendering as separate proof layers.
SendArq uses a guided copy-and-paste installation path. Published output contains email-safe HTML, complete plain text, absolute HTTPS media, and no script.
Microsoft Outlook, Apple Mail, Gmail mobile, native mobile clients, centralized Google Workspace deployment, and Microsoft 365 deployment remain outside the current compatibility claim.
These may work in part, but unverified behavior is not presented as support.
Support matrix
Client versions are recorded only after a practical send-and-receive evidence run. The table therefore names the service tier and boundary without inventing version coverage.
| Client or surface | Install or use path | Current service tier | Evidence boundary |
|---|---|---|---|
| Gmail on the web in a current desktop browser | Copy the published signature, paste it into Gmail settings, save, and send a test. | Gmail Web manual-installation baseline | Preview, copy, Gmail editor, sent message, recipient rendering, linked media, and image-blocked behavior are separate release checks. |
| Gmail mobile on iOS or Android | Not offered as an installation path. | Not supported | Do not rely on mobile composition or rendering until a dated client-evidence run adds it. |
| Microsoft Outlook, desktop or web | Not offered as an installation path. | Not supported | HTML rewriting, image display, and dark-mode behavior have not been verified for this service tier. |
| Apple Mail on macOS or iOS | Not offered as an installation path. | Not supported | HTML rewriting, image display, and dark-mode behavior have not been verified for this service tier. |
| Centralized Google Workspace or Microsoft 365 deployment | Not offered. | Outside the service | SendArq does not write organization-wide mailbox settings or request mailbox-administration access. |
Why the caution?
A signature that looks correct in a browser can change when copied, pasted, sent, or received. The release compatibility gate must reconcile each layer with dated artifacts before the claim expands.