If you’re managing multiple email accounts, in my opinion, Mozilla Thunderbird is absolutely the best email client you can have.
As an online marketer, I have several email addresses, all but one of them is a Gmail address. I have one I use as a primary, personal account, and the rest are for business.
I also have a Comcast email address that I set up years ago when I started using Comcast as my Internet service provider.
Web-based and Outlook vs. Thunderbird
Now, a lot of people still go on the Web to check their email, but I find it’s a real pain in the butt, seriously inconvenient, especially when you have multiple email accounts you need to manage.