With Instantly you can connect unlimited accounts to warm up and send from and unlimited accounts to one campaign so you do not need to create a separate campaign for each account.
You can add more sending accounts by following these quick steps:
On your Campaigns tab, select the Options section.
Go to Accounts to use and select the drop-down.
Select one or more accounts to send emails from. Instantly will then rotate sending emails between these selected accounts to make it more natural.
FAQ
Q: How will my emails be sent if I have more than one email account as a sender?
A: If you have more than one account as a sender and a gap of 5 minutes, every 5 minutes you will have one email sent from each email sender.
Q: What will happen with my campaign if I remove one email sender?
A: If you remove the email account from an active campaign, another account will take over. But only if you remove it from the campaign's list manually.
Q: What will happen with sending in my campaign if my email account is disconnected?
A: If an account is simply disconnected or removed from the email accounts dashboard, then the campaign waits for it.
You need to remove this account from the campaign itself for another account to take over.