Best Apple Mail Extensions to Manage Your Emails on Mac

Blog Summary – Apple Mail may have changed over the course of time but it still requires a bunch of necessary features to increase productivity. Those looking for such add ons and always take help from the best Apple Mail extensions from this list. 

Are you not able to get enough out of the basic Apple Mail application? Switching to the best Apple mail extensions is a good idea as it helps manage emails like a specialist. These small plugins boost your productivity without occupying much space. They have a simple interface, innovative labels, multipurpose filters, enhanced security, new message notifications, and a lot more.

Here’s a quick list of the best Apple mail plugins that will turn your Apple Mail into a pretty powerful email client. Check them out.

10 Best Apple Mail Extensions

1. Moom

Having trouble viewing content on your Mac? Use Moom, one of the best Mac mail extensions to move and zoom windows with this nifty add-on. This Apple mail extension offers a wide array of option, once you install it move your mouse over the green zoom button on any window and perform the following actions:

  • Move & Zoom to Full Screen
  • Move & Zoom to Left Half
  • Move & Zoom to Right Half
  • Move & Zoom to Top Half
  • Move & Zoom to Bottom Half
  • Revert to original dimensions

Know more:- Use Smart Reply For Instant Reply In Gmail

Besides this, drag the half/width icons to zoom Quarter, drag those icons for multiple displays. Plus, use Grid to resize and move windows by dragging mouses across segments. You can even zoom windows more by dragging them to screen edges.

Notable features –

  • Moves windows easily.
  • Zooms-in and out for your convenience.
  • Save layouts for windows.
  • Keyboard shortcuts available.

Download Now

2. MailSteward

MailSteward is an ultimate Apple mail extension, email manager as it is bundled with umpteen features to make your mailing experience enjoyable. Using this Apple mail plugin, you can archive emails from multiple accounts into a secure, single and searchable database. It has an easy-to-use interface and even imports and exports email from Postbox for Mac and Apple Mail. Besides this, the thing that makes MailSteward Pro the best Mac mail extension is added enterprise-level support for MySQL and Amazon cloud Aurora DB.

Notable features –

  • Quick speed search for inbox.
  • Clears inbox effectively.
  • Merges databases.
  • Save frequently searched terms.

Download Now

3. MailButler

Your personal assistant to manage your mails. It lets you add additional information to your emails by attaching notes, adding to-do items and reminders. You can even mark them as done once the task is completed. Besides, attach notes and tasks to outgoing emails, schedule emails to be sent later on a specific date and time. Additionally, with this one of the best Apple mail plugins get notified when a recipient opens your email, prepares a template and saves time, undo sent, attachment reminder, snooze and follow up reminder.

Notable features –

  • Track your email delivery time & more.
  • Personalized signature.
  • Automates tasks.
  • Snoozes emails for a clutter-free environment.

Download Now

4. MailTags

Fourth in the list is MailTags. This best Mac mail extension helps organize messages by keywords, projects, importance, color, due date and more. You can create a rule to automatically assign tags to all incoming messages, search mails via mail tags and tag old mails. MailTags Apple mail plugin displays tags in both message list and full message view and it operates with most IMAP servers, Gmail servers, and Exchange servers.

Notable features –

  • Shows color coded messages.
  • Automate assigning tasks to messages.
  • Organizes messages using keywords.
  • Add tags for easy workflow.

Know more:- 10 Useful Gmail Extensions to Boost your Productivity

5. Mail Act-On

Effortlessly manage your emails with Mail Act-On. A popular Mac mail extension that offers powerful keystroke rules and message filing interface, allowing you to take quick actions on your mail. The Apple mail plugin manages your outbox rules, you can automatically CC or BCC messages depending on rule criteria. You can choose where to archive an email while sending it and reply with the template to save time

Notable features –

  • Organize inbox and outbox with rules.
  • Mark messages as read.
  • Send quick replies with templates.
  • Move messages to set folders.

6. SpamSieve

Keep your inbox spam-free with SpamSieve best Mac mail extension. A local spam filter that saves your time by filtering spam emails from almost all email clients for Mac. It uses Bayesian spam filtering to provide accurate results. It learns and adapts to your mails to block almost all the junk without messing with the good message. Plus, it automatically maintains a whitelist to make sure that previous interactions aren’t marked as spam. Besides this, you can quickly and easily control SpamSieve from within Apple Mail, Airmail, Entourage, MailMate, Mailsmith, Outlook, Postbox, PowerMail, and more. Additionally, it integrates with your contacts to put their messages directly in the inbox.

Notable features –

  • Filter spam easily.
  • Different color codes for spam severity.
  • Maintains a blocklist.
  • Learns and performs better with time.

Download Now

7. MsgFiler

Declutter your inbox and save time with a keyboard-based email filing application MsgFiler. Just type to filter down the mailboxes and press return to file sorted messages in Mail. Navigate, select, move and copy mails without taking your hands off the keyboard. Say goodbye to dragging and dropping emails and say hello to more time by your side to do important work with this best Mac mail extension.

Notable features –

  • Label the messages easily.
  • Works completely on a keyboard control.
  • Navigate in your inbox.
  • Move, copy and file the messages accordingly.

Download Now

8. DockStar

Keep an eye on your email messages with DockStar. This extension adds an extra badge to Mail’s dock icon thus helping you to sort unread messages from more than one mailbox.

Notable features –

  • Add fun badges to different accounts.
  • Get the number for spam, junk and unread messages.
  • Add dashboard widget.
  • Works with up to 5 mailboxes.

Download Now

9. Mail Designer 365


Mail Destination 365 is a modern application to help you improve the experience of sending mails on Mac. With this you get 200+ designer layouts, image editing tools, web font & typography support. This will help you create visually appealing emails for the newsletters. It supports mails optimized for the mobile view. You can also save your designs and reuse them again for the next time for sending these letters.

Notable features –

  • Easily design professional mails.
  • Create email campaigns.
  • Get live delivery statistics.
  • Works with collaborative teams. 

Download Now

10. Herald


Go beyond Mac’s built-in notifications with Herald. It allows performing common actions directly from within the notification windows, including message deleting, replying to them and marking as read. Besides this, Herald best Mac mail extension has a Message Grouping feature that helps to cut down on clutter and allows users to read the full message by using a scrollable window.

Notable features –

  • Works directly from notifications.
  • Quick view full message without opening Mail app.
  • Group messages together.
  • Reject alerts after a set time. 

Download Now

Verdict –

With these Apple mail plugins you will surely experience enhanced Mac mail functionality. There are multiple features such as composing tools, filtering emails, adding security, blocking content. As well as, now you do not have to worry about missing a reply or send an email, as the best Apple plugins will help stay organized. Get Mail Designer 365 for creating fantastic email campaigns and track the results or Moom for basic efficiency at work. Select the most suitable Apple mail extensions based on your needs and make use of the capabilities to increase efficiency. 


Q1. How do I find my Mail plugin on Mac?

Go to Mail application> Settings> General> Plugins section and here you can see the list of the added mail extensions for Mac.

Q2. How do I use Mac Mail plugins?

There are several mail plugins available for Mac, to use them you need to download & install them on your Mac. Thereafter, open Mail app, go to Settings and then open Extensions. Turn on the extensions which you wish to use with your Mail app. 

Q3. How do I manage Mail plugins on Mac?

Open Apple Mail app> Preferences> General> Manage Plug-in option. Select any one from the list of downloaded plugins to sort your mails with multiple filters.


  • comment_avtar
    Trevor Deck
    I think these are great, but I have one specific need I’d like to see fulfilled. I’d love to have a way to attach a Post It note to an email, so that when I open it again, I can see the Post It I put on it, with my 3 or 4 word summary, a quick thought, or follow up questions for when I have time to get back to it. Seen anything like this? Know of anyone developing it?

    4 years ago
  • comment_avtar
    Hello Trevor, yoy might be looking for smallcubed mailsuite. I am just tryining this, seems promising.

    4 years ago
  • comment_avtar
    is there a plug in that allows me to PERMANENTLY change the default font color in my ‘new messages’?

    3 years ago
  • comment_avtar
    What I am looking for right now is a plug-in which would give me back all of the Mac Mail features which were lost when I upgraded to Catalina. I’m thinking, being able to control column width, which fields are in the columns, and the order. I would love to have the option to get rid of “Top Hits” when I search through mail. I am sure there other things which got eliminated when Apple streamlined Mail to be more iOS-like, which could be brought back. I can’t figure out how to adjust scrolling amount in Mail specifically. Was that there before, or is it my faulty memory? That is the horrible thing about eliminating features without pointing it out to customers, it makes them distrust and project things on to Apple that may not even be true!

    3 years ago
  • comment_avtar
    Jan Steinman
    Unfortunately, Herald stopped working after High Sierra, and according to its web page, there is no plan to port it to Mojave and further. in Mojave refuses to load it. Anyone know of any Herald alternatives? I LOVED that thing!

    3 years ago
  • comment_avtar
    Mailbutler is not working properly anymore since a few weeks. So sad. It was great but not anymore.

    3 years ago
  • comment_avtar
    MailHub was amazing… and by “was” I mean to say that it stoped working with macOS Big Sur and there are no plans for it to reemerge.

    3 years ago

Leave a Reply

Your email address will not be published. Required fields are marked *

Subscribe Now & Never Miss The Latest Tech Updates!

Enter your e-mail address and click the Subscribe button to receive great content and coupon codes for amazing discounts.

Don't Miss Out. Complete the subscription Now.