Simply: no, you do not need third party tools to warmup your inboxes.
Warming up your inbox means gradually increasing the volume of emails you send from a new or inactive email address to establish a good sender reputation and avoid getting marked as spam.
This is important because email providers like Gmail, Yahoo, and Outlook use sender reputation as a major factor in determining whether to deliver an email to the inbox or the spam folder.
While some email marketing platforms may require you to use external tools to warm up your inbox, Bento has its own built-in strategies that simplify the process. This means that you don't have to worry about the technical details of warming up your domain and can focus on creating and sending your emails.
All you need to do in Bento is start sending your emails slowly in batches, preferably over several days, to gradually build your reputation and increase your deliverability rates.
This helps to ensure that your emails land in your subscribers' inboxes rather than getting classified as spam.
It's worth noting that if you want to experiment with using external tools to warm up your domain, you can do so, but it's not necessary nor does it need to be integrated with Bento.