Mailbutler is well suited to people who predominantly use their Mac for email. It adds a rich feature set to macOS Mail's native features. Mailbutler is less useful to people who frequently process email on iOS/iPadOS. Only a limited subset of Mailbutler's functionality is available on iOS/iPadOS as Apple doesn't currently provide a way for third parties to extend the iOS/iPadOS Mail app.
If you don't have a huge budget and want something that works with minor quirks here and there then Zoho Mail is definitely something you should look into. For half the price of Google G Suite or Office account you get 5GB of storage per user and can send up to 25MB emails without restrictions. Great for small businesses in my opinion. I have had some issues with their spam filter, but we use SpamTitan and just shut off the one that comes with Zoho Mail. Zoho's spam filter isn't horrible but you should definitely use something in addition or instead of what comes with Zoho.
I really like that there is a free version in which a single user can be created. It is really useful because it allows you to evaluate each characteristic of the service without having to buy it.
I also really like the visual aspect of the inbox, which is partially customizable. Because you can make small changes such as changing the color, the language, and among other things.
Mailbutler occasionally conflicts with other macOS Mail plug-ins. Though, in most (if not all) cases the issue tends to be with other plugins.
The Mail app for iOS/iPadOS doesn't support plugins, making it necessary to use Mailbutler's own app to access a limited subset of the functionality on macOS/iPadOS.
It is very easy to use and does all you need. It sends newsletters to their own folder. A notification folder for more important things. The Spam folder collect the right amount of spam emails
I have spoken with Zoho several times and their support is always friendly and helpful. I have always been asked for security pins and codes when seeking assistance which helps me to feel my accounts are secure and I have never had to wait on hold to speak with someone for more than 5 minutes. They always seem to have someone available to help. If you call asking for instructions on how to do something they gladly walk you through the process and if you just need something done and don't have time to do it yourself they will happily customize whatever you need without you having to spend all day with it.
I'm not aware of any other products that provide the same functionality within the macOS Mail client. There are some third-party email apps for macOS and iOS/iPadOS that have some of Mailbutler's features, but my preference is to stay with Apple's Mail client, partially for security reasons.
Zoho is free. Also, there is no need for a separate IT guy for creating mail, or if any issues come you don't have to find anyone anyone can check and fix all issues from their super admin panel. Zoho overview is much better than outlook and its appearance of getting mail popup and functionality is better than outlook. My friend suggested for this and also after using I have referred my friend