Are there any related issues?

Did not find any.

What operating system are you using?

macos

What version of Mailspring are you using?

1.0.3

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Does this feature exist in another mail client or tool you use?

Yes

Please provide a reading pane below the messages pane.
A reading pane beside the messages pane wastes a lot of space. Space below the messages is

The problem is obtaining system DNS configuration for use in resolver code. The relevant function is NewExtResolver in framework/dns/dnssec.go.

According to https://stackoverflow.com/a/13417318 comments it can be read from registry (DhcpNameServer or NameServer for each interface). Need to figure out which value should be preferred if there are multiple interfaces (or just use them all?).

In email templates I use {{$message->embed(public_path('i/slojj-2.png'))}} instead direct links to images.

<img src="cid:446cd432636b61d9409244e6f3acd9d7@swift.generated" alt="" border="0" width="120px">

https://laravel.com/docs/6.x/mail#inline-attachments

Homebrew tap is way out of date, goreleaser should be able to generate a new one. Not sure if it will help with launching Inbucket at boot.