Here’s a Knowledge Base article tailored for iCoreHosting customers:
Why Does iCoreHosting Enforce Hourly Email Sending Limits?
Introduction
At iCoreHosting, we enforce hourly email sending limits to ensure the reliability, security, and performance of our email hosting services. These limits help prevent abuse, maintain server health, and ensure high deliverability rates for all users.
Why Are There Hourly Sending Limits?
1. Preventing Spam and Server Blacklisting
If an email account sends too many emails in a short period, it can be flagged as spam by email service providers (Gmail, Outlook, Yahoo, etc.). When an email server gets blacklisted, it affects all users on the server. Hourly limits help protect the server’s IP reputation and ensure emails reach inboxes.
2. Fair Resource Usage
Email hosting is a shared service, meaning multiple users rely on the same infrastructure. Sending limits prevent a single user from overloading the server, ensuring smooth performance for all customers.
3. Protection Against Hacked or Compromised Accounts
If an email account is compromised (e.g., due to weak passwords or phishing attacks), hackers may send thousands of spam emails in a short time. Our hourly limit helps mitigate the damage and prevents your domain from being flagged as a spam sender.
4. Compliance with Email Provider Receiving Limits
Many popular email providers impose limits on how many emails they accept per hour or day. If you exceed these limits, your emails may be delayed, rejected, or marked as spam. Our sending limits align with industry standards to improve email deliverability.
5. Avoiding Email Queue Overload
If too many emails are sent simultaneously, the email queue can get overloaded, causing delays in delivery. The hourly limit ensures a steady and controlled email flow.
iCoreHosting Email Sending Limits
Our email hosting plans have different limits based on the package you choose:
|
Hosting Plan |
Hourly Email Sending Limit |
|---|---|
|
Standard Email Hosting |
100 emails/hour |
|
Premium Email Hosting |
300 emails/hour |
|
Enterprise Email Hosting |
500 emails/hour |
|
Custom Solutions (Dedicated Mail Server) |
Contact Support |
Note: If you need a higher sending limit, please contact our support team for a custom email solution.
Common Email Receiving Limits of Major Providers
Most email providers have their own limits on how many emails they receive per hour. Exceeding these limits may cause your emails to be rejected or flagged.
|
Email Provider |
Receiving Limit |
|---|---|
|
Gmail (Google Workspace) |
3,600 per hour |
|
Outlook / Microsoft 365 |
3,600 per hour |
|
Yahoo Mail |
No official limit (but strict spam filtering) |
|
Zoho Mail |
No official limit |
|
ProtonMail |
No official limit |
|
iCloud Mail |
No official limit |
What Happens If You Exceed the Sending Limit?
If you exceed your email sending limit, you may experience:
•Emails being temporarily queued and sent later.
•Some messages being rejected with a bounce-back error.
•Your email account being temporarily suspended for security reasons.
To avoid reaching the limit, we recommend:
✅ Spreading out email sending over time.
✅ Using email marketing tools for bulk emails (e.g., MailChimp, SendGrid, or Amazon SES).
✅ Upgrading to Business or Enterprise Email Hosting for higher sending limits.
Need Higher Email Sending Limits?
If your business requires a higher email sending limit, contact our iCoreHosting Support Team for a tailored Dedicated Email Hosting solution.
Contact Us: https://www.icore.com.my/support
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