How can I start mailing? Integrating with Lob is easy! You can start mailing by following the steps below: Sign up for an account. Start with our Getting Started Guides. Related articles What other services do you integrate with? What are Priority Mail Queuing and Lob’s Service Level Guarantee? I'm currently on the Address Verification Developer plan. What happens if I upgrade in the middle of a month? What are Lob’s business hours of operation? How does the max number of monthly mailings work? If my requests exceed the max number of mailings will I experience an error message?