We are phasing out Zendesk. Please see Discourse instead: https://community.getmailspring.com/t/search-with-advanced-gmail-style-queries/153
Mailspring builds a search index on your computer, so you can search through your email in seconds. In addition to searching for an email by a name, email address, or subject line, you can search in more advanced ways.
1. Search message contents
When you view an email message, Mailspring caches it's content so you can search for it later. Your search queries can include words, phrases, and URLs used in the body of an email.
2. Search for multiple phrases
Mailspring supports the AND and OR search operators, so you can search for emails based on multiple criteria, for example:
"from:firstname.lastname@example.org OR from:email@example.com"
3. Search in a specific label or folder
To search a specific folder or label, use the "in:" keyword in the search bar. For example, to search your sent messages for "contract", you'd say:
4. Search using Gmail-style search phrases
Mailspring supports other Gmail-style search queries, like "is: unread", "has: attachment", and "from: firstname.lastname@example.org".