Customising with add-ons
Because building on top of the stock install isn’t enough…
Mailspring’s default installation is the sum total of what’s on offer. You’re provided with a few more features if you opt to subscribe to the Pro version, at a cost of $8 per month (£6), but it still doesn’t give you as many features as you can get with the other tools.
Claws is a straightforward email client, and you must resort to its plug-ins if you want additional features, such as a news aggregator. One such add-on is the ACPI notifier plug-in, which can light up the new email light on some laptop models, from Acer and Asus, for example. You can also opt from one of several themes to change the appearance of the interface.
Evolution’s default installation already has several plug-ins installed and enabled. In fact, many of its basic email features, such as new mail notification is also provided through a plug-in.
A lot of functionality on KMail is driven with what the application itself identifies as plug-ins. Click Settings>Configure KMail and click Plug-ins on the sidebar for a list. You might be especially interested in the ad-blocker plug-in. Thunderbird offers the choice of dozens of themes to change the appearance, in addition to specific extensions to tweak the menu entries and make other changes to the interface. You also get functionality such as the Automatic Dictionary. This extension can be used to remember the language you use when communicating with a particular person or group and automatically switches the spell-checker. The add-ons page provides a categorised list of available extensions such as Contacts, Folders and Filters, Message and News reading, Privacy and Security, and Tags. You can also scroll through the Most Popular list on the left.