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Understand your prepaid subscription, how to upgrade or downgrade, and what counts as a contact. Learn about proration, updating payment methods, and managing billing limits.

Know your subscription plan and billing

Step-by-step guide to subscribing to SendX add-ons like List Cleaning, Dedicated IP, and Inbox Warmup. Includes instructions for canceling add-ons and what happens to unused credits.

How to Subscribe to and Cancel Add-ons

Learn how SendX add-on billing works. Understand the difference between prepaid add-ons (flat monthly fees) and postpaid add-ons (usage-based charges billed after use).

Understanding Add-on Billing: Prepaid vs Postpaid

Overview of SendX paid add-ons including Inbox Testing, Inbox Warmup, Live Warmup, Elevated Support, and Professional Services. Includes pricing and when to use each.

How Other Paid Add-ons Work

Understand Dedicated IP pricing ($300/year), annual billing cycle, and renewal process. Learn when you need a dedicated IP and how to manage your subscription.

How Dedicated IP Billing Works

Learn how SendX invoicing works. Each subscription (core plan, add-ons) generates its own invoice. Understand proration, usage-based charges, account credits, and how to access invoices in the Stripe portal.

Understanding Your SendX Invoice

New SendX teams get a 14-day free trial with 500 contacts and 500 emails. Learn what happens when trials expire, including the Day 18 cleanup of forms, integrations, and blog…

Adding a new team and what happens when a team's trial ends

Learn how the 14-day free trial works, including the 500 contact limit and what happens if you exceed it. Understand the trial expiry timeline, how to upgrade, and the irreversible…

How the free trial works

Ready to upgrade from your SendX free trial? Learn how to choose a contact tier, select billing interval, and complete Stripe payment. Annual plans save 25%.

How to upgrade from trial to a paid plan

Learn how to change your subscription tier or switch between monthly and annual billing. Understand prorated charges for upgrades, how account credits work for downgrades, and why you must lower…

How to upgrade or downgrade your plan

Learn how usage-based add-ons are billed in SendX. Covers List Cleaning ($10 base + $0.003/email overage), Transactional Email, and Threat Checks pricing and billing cycles.

How Transactional Email and List Cleaning Billing Work

Learn why your team is locked and sending is disabled. Understand how to unlock your account immediately by upgrading your tier or deleting contacts, and how overage alerts work.

What happens when you exceed your contact limit

Troubleshoot payment failures and learn why your team is locked. Find instructions for updating your card, handling 3D Secure (3DS) verification, and understanding the automatic retry schedule.

What happens when a payment fails

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