Move messages from mailbox_1@tld_1.com to mailbox_2@tld_2.com

The Problem

Moving a message / thread from mailbox_1@tld_1.com to another mailbox_2@tld_2.com is not possible.

Proposed Solution

It should be possible, to move messages from one mailbox to another. At the moment it’s only possible to move messages / threads into subfolder of the same mailbox. If you have multiple mailboxes with different TLDs you can not move the messages with mailspring client

Alternative Solutions

none

Context

no further info

Having the same problem. I switched from having Gmail collect everything to Mailspring’s unified mailbox and now I am stuck with not being able to move incoming emails from one mailbox to the other.
Any solution four years later?