Mail Manager Related Records. Add to Existing

[adspacegroup]

In the Action Picklist in the mail manager (where it says Related Records), it only has options to add records.
Is there a way to connect a received email to an existing record? or in other terms, add options like "connect to existing organization".

[joebordes]

https://github.com/tsolucio/corebos/issues/1142

[inspectorflint]

It is possible to add modules in the picklist related records? Specifically the Vendors module. I need to relate the emails with this module. Thanks