Troubleshooting Sending Quota Exceeded Error

title: Troubleshooting Sending Quota Exceeded Error
description: Common causes of the sending quota exceeded error and how to fix each one in SalesBlink.

Overview

This error appears when your email account hits a sending limit set by your email provider. Below are the most common causes and how to fix each one.

Sending emails too quickly

Sending a large number of emails in a short period can trigger this error. Keep a minimum time gap of 10 to 15 minutes between sends to avoid hitting the quota and prevent the error.

Daily volume exceeding safe limits

If you send a high volume of emails to a large number of Leads, it can surpass the limit set by your provider. Reduce your maximum emails and WarmUp to 40 to 50 in total (outbound + WarmUp combined), and use the Smart Adjust feature if available.

Repetitive or flagged email copy

If your email content is flagged as repetitive or spammy, it can cause the quota to be exceeded. Use spintax and A/B testing to generate unique, engaging copy and avoid triggering spam filters.

Spam complaints from recipients

If recipients report your emails as spam, it can result in the quota being exceeded. Follow best practices: send only to recipients who have opted in, provide clear unsubscribe options, and avoid spammy content. Monitor and address spam complaints to maintain a good sending reputation.

Temporary provider restriction

Sometimes the Sending Quota Exceeded error is temporary and is automatically resolved by your email provider within 24 hours. In that case, simply wait for the issue to clear on its own.

Inaccurate ideal customer profile (ICP)

Sending emails to recipients who are not part of your target audience or ICP can cause the quota to be exceeded. Keep your email list updated and aligned with your ICP to avoid sending to irrelevant recipients.

Using outdated authentication

If you are still using outdated authentication methods such as username and password, it can cause quota issues. Moving to modern authentication like OAuth helps you avoid such errors and improves security.

Still need help?

By following these fixes you can keep your email sending optimised and prevent disruptions in your sequences. If you continue to encounter issues, contact your email provider for further assistance.

Updated on: 18/08/2026