Adding to one CRM user several emails from different domains to send and receive 1-to-1 emails in the CRM

Hello guys,

anybody knows if it is possible to add to one CRM user several emails from different domains to send and receive 1-to-1 emails in the CRM? The reason: I use 1 email address from domain .io for 1-to-1 communication only, and 2 emails from 2 other domains for cold outreach only (this is done by a third party app). And I want that the answers from outreach would come all in the CRM, and that I also can answer them from ActiveCampaign. Sure, it would work via 3 separate users, but that costs triple money. Any idea if it is possible with one Sales License user?

Thanks in advance!

Best,
Simon