Feature Request: Per-identity SMTP configuration or sender-dependent routing for Thunderbird on Android

[tekauru]

Requesting a critical enhancement for Thunderbird for Android: the ability to assign independent Outgoing SMTP servers to specific identities under a single account profile.

The Android app currently allows users to manage multiple email aliases via "Manage Identities". However, unlike the desktop version, it forces all identities within a profile to share a single global SMTP configuration. When utilizing external aliases (such as @Gmail.com or @Icloud.com hosted/nested under a custom domain profile), this restriction causes immediate delivery failures due to what I assume are strict server-side anti-spoofing protocols.

Since the infrastructure for managing multiple identities and SMTP profiles already exists in the app, allowing them to be linked at the identity level is a logical next step. Alternatively, implementing Sender-Dependent SMTP Routing would achieve the same result by dynamically mapping the outgoing mail server to the selected "From" address.

Enabling this capability would bridge a major functional gap between the desktop and mobile applications, providing a truly seamless multi-identity workflow.

[Jon]

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