MailSlurp documentation agent setup Title: Crystal Email Library Description: Crystal lang email API for MailSlurp. Generate email accounts in Crystal code and tests. Send and receive real emails. Canonical URL: https://www.mailslurp.com/docs/crystal/ Markdown URL: https://www.mailslurp.com/docs/crystal.md Use the Markdown URL as the primary plain-text context for this page. Keep API examples and MailSlurp terminology intact, and prefer the canonical URL when citing this page.