There is a 500 hourly outgoing email limit per domain on all shared servers. This limit is also applied towards mailing lists. If you send over this amount in any hour, the e-mails will fail and may bounce back with a undeliverable error.
Shared servers limit each connecting IP to 30 POP checks per hour. If you go over this, you will likely get a password error indicating your login is incorrect. To fix this, just wait an hour and it will automatically unlock. To prevent this from happening, disable automatic send/receive or set a higher time interval, such as checking once every 10 minutes.
Any mailing list over 900 email addresses is only allowed to be sent to during off-peak times to prevent high server loads. Off peak times qualify as all day Saturday and Sunday, and 1AM - 8AM Eastern Standard Time, Monday through Friday.
Any mailing list larger than 5,000 addresses will require a dedicated hosting solution from us. Note: Dividing one large list into smaller lists to get below this limit is not allowed. You cannot send 12,000 emails per day (500 x 24 hours) on a shared account.
Dedicated server and VPS accounts can send and receive unlimited emails per hour, and do not have the restrictions above.
I get a bounce back indicating my email has been tagged as spam due to exceeding a 500 e-mail per hour limit.
You will need to wait until the next hour to continue sending emails.
If this problem does not go away by the next hour, please email abuse@hostmop.com
CAN-SPAM rules
Online businesses that use e-mail marketing must follow all the CAN-SPAM rules.
- Identify your message as an advertisement.
- Include an unsubscribe mechanism.
- Include a valid physical postal address.
- Deceptive subject lines and false headers are outlawed.
- You will be held responsible if anyone sends emails on your behalf.