When comparing Evolution vs Mailspring, the Slant community recommends Evolution for most people. In the question“What are the best native e-mail clients for Linux?” Evolution is ranked 2nd while Mailspring is ranked 7th.
Ranked in these QuestionsQuestion Ranking
Pro Manages contacts, tasks, calendar and memos as well
Pro Great integration with Gnome environment
Pro Clean interface with 2 layout variants
Going to View > Preview has the option of switching between "Classical View" and "Vertical View".
Pro Supports exchange servers
Evolution is one of the few Linux desktop e-mail clients that's supports exchange servers.
Pro Good support for Google's services
Pro HTML rendering is great
Of the many email clients available on GNU/Linux, Evolution has the best HTML renderer. It renders HTML and the entire email content exactly like it would appear on a full blown web browser. Not many email clients are capable of doing that.
Pro Excellent GPG support
The integration with GPG is excellent. You can sign, encrypt, decrypt, authenticate and verify GPG signatures and GPG signed/encrypted email messages. All of that is just a setting away.
Pro Neat UI
The UI is very well designed and neat.
Pro Unlimited number of accounts
Pro CPU / battery efficient
Mailspring uses a C++ sync engine designed to be as efficient as possible, so you can leave the app running and not see your laptop battery life drain away.
Pro Snoozing support
You can swipe to archive / snooze messages and specify when you'd like them to resurface in your inbox.
Pro Unified inbox
Using a single inbox for all of your email accounts helps you get more done in less time. Mailspring supports every major mail provider—Gmail, iCloud, Office 365, Outlook.com, Yahoo!, and IMAP/SMTP—so you have a single, streamlined command center for all your messages.
Pro Read receipts and link tracking
Activity tracking is built into Mailspring so you get notified as soon as contacts read your messages and can follow up appropriately.
Pro Great integration with Gmail
Mailspring has great integration with gmail features and tags.
Con Can't choose different settings for each mail account
Settings have to applied to all mail accounts.
Con RAM heavy
Very heavy on RAM usage.
Con Can't use without creating a Mailspring ID
There is no need to create a third party ID for an email client. What if the Mailspring closes in the future - can't install a previously downloaded Mailspring software any more to continue using it or access your stored emails?
Con No portable windows (.zip) bundle available
Con Pro subscription model
To use some features, like contact profiles and link tracking more than a few times a month, you need to pay for a Pro subscription.
Con No addressbook
Con No way to see messages as plain text
And HTML is only optional.
Con Very limited user interface
No way to see the messages as a list, no way to rearrange views.
Con UI is sluggish (Windows)
Click and only after a tiny delay (~half second) something happens.
Con Does not support POP
Con Does not support multi-user installation (Windows)
But instead installs to the user's home directory.