# Virtual inboxes ![](/assets/trap.svg) MailSlurp inboxes can be used to trap outbound emails so that no emails are ever sent to real recipients. Catching mail requires the creation of a virtual [inbox](/docs/inboxes/). ## Creating mail catchers ```typescript const mailTrap = await mailslurp.inboxController.createInboxWithOptions({ createInboxDto: { virtualInbox: true, }, }); ``` Documentation Documentation Documentation Documentation Documentation Documentation Documentation ## Trapping outbound sent emails Virtual inboxes capture outbound emails and prevent the sending to real customers. You can verify sent email using the virtualSend property. ```typescript const sent = await mailslurp.inboxController.sendEmailAndConfirm({ inboxId: mailTrap.id, sendEmailOptions: { to: [customer.emailAddress], subject: 'Test email', body: 'This is using a virtual inbox and will not be sent to real customers', }, }); expect(sent.to).toContain(customer.emailAddress); expect(sent.virtualSend).toBeTruthy(); ``` Documentation Documentation Documentation Documentation Documentation Documentation Documentation