How to Fix the "Too Many Emails Per Hour" Sending Limit Error

Every ZIPROF hosting account has a limit on how many emails it can send out in an hour. This is a standard anti-spam safeguard on shared servers, not a fault in your account. If you go over it, the extra messages get queued or bounced with an error mentioning a rate or frequency limit, and legitimate email (invoices, contact form replies, newsletters) can be delayed until the hour resets.

Why This Limit Exists

Shared hosting servers host many customers on the same IP address. If one account sends a huge burst of email, whether from a real campaign or a compromised script, it puts every other customer on that server at risk of being blacklisted. The hourly cap keeps sending volume predictable and protects the server's reputation with mail providers like Gmail and Outlook.

If you're hitting this limit unexpectedly, and you didn't send a bulk campaign yourself, treat it as a warning sign. A compromised email account or a hacked contact form script can silently send thousands of spam messages and burn through your limit in minutes.

How to Check Your Current Email Usage

In cPanel

1. Log in to cPanel.
2. Under the Email section, open Track Delivery.
3. Review the delivery log for messages marked as deferred or failed with a reason referencing a rate limit or "too many emails per hour."
4. If you have access to Email Deliverability, check it too. It won't show your send count directly, but it will flag related DNS issues that can make the problem worse.

In DirectAdmin

1. Log in to DirectAdmin.
2. Go to Email Accounts and check the Send Limits or Email Usage section if it's available on your account, which shows how many messages have gone out against your hourly allowance.
3. If messages are bouncing, check your inbox for the bounce notifications; they usually name the specific limit that was exceeded.

How to Fix It

1. Wait it out. The counter resets on a rolling hourly basis, so messages that were queued rather than rejected outright will usually go out once you're back under the limit.
2. Slow down your sending. If you're sending a newsletter or bulk invoices, split the list into smaller batches sent over several hours instead of all at once.
3. Check for compromise first. Before assuming it's just volume, confirm the sending account and password haven't been reused elsewhere or leaked, and that no contact form or script on your website is sending mail without your knowledge.
4. Use a dedicated email sending service for bulk mail. For newsletters, marketing campaigns, or high-volume transactional email (like order confirmations on an online store), a purpose-built email sending service is a better fit than your regular hosting mailbox, since it's built for that volume and won't affect your everyday business email.
5. Ask support to review your limit. If your business genuinely needs a higher sustained sending volume, contact ZIPROF support with details of what you're sending and how often, so the limit can be reviewed for your account.

Preventing This in the Future

• Keep bulk sends (newsletters, promotions, mass reminders) on a dedicated email sending service rather than your hosting mailbox.
• Use strong, unique passwords on every email account so none of them can be hijacked and used to blast spam through your allowance.
• Review any website forms or scripts that send email automatically, and make sure they can't be abused to fire off messages in bulk.

If you suspect an account has already been compromised and is what's driving the volume, see Why Is Your Email Account Sending Spam? How to Detect and Stop a Compromised Account.