There is a 200 hourly email limit per domain this limit is also applied towards mailman. If you send over this amount in any hour most of the e-mails will bounce back with a undeliverable error.
Many of our servers have a 60 pop checks per hour limit per domain. If you go over this you're likely to get a wrong password error message saying login incorrect. Just wait an hour and it will automatically unlock you. to prevent this from happening again make sure to disable auto checking or at least set it to something higher such as 5 minutes.
Any mailing list larger than 2,500 will require a dedicated hosting solution from us. Note: dividing one large list into smaller lists to get below this limit is not allowed.
Mailing Lists Rules
Anytime you're sending a message no matter how large your e-mail list is you must throttle it. We recommend you throttle it to no faster than sending 1 email every 6 seconds.
If the mailing list software you're using does not allow you to throttle you must switch to something else.
You are not allowed to mail to a mailing list you were given or purchased.
Any unsolicited e-mail being sent will result in termination of the offending account. We take a zero tolerance stance against sending of unsolicited e-mail.
Any mailling list MUST comply with all guidelines set forth by the United States. http://business.ftc.gov/documents/bus61-can-spam-act-compliance-guide-business
No Direct SMTP mailers are allowed. An example of this is DarkMailer.
Any mail should be relayed through the local MTA (localhost:25) for further delivery by the server and not done directly by scripts.
Default cPanel Accounts / Catch-Alls
The default mail account created with cPanel may be emptied daily. The default account is a receive-only account and is not capable of sending mail. Often this default mailbox is ignored resulting in hundreds of thousands of emails from scripts filling this box and never being manually emptied. Should you require a catch-all, please create a regular email account in your cPanel under "Email Accounts" and then set that email address as the default (catch-all) under the option "Default Address."
Prohibited Uses of PosibleHost Hosting Systems and Services Regarding Spam
Sending Unsolicited Bulk Email ("UBE", "spam"). The sending of any form of Unsolicited Bulk Email through PosibleHost Hosting's servers is prohibited. Likewise, the sending of UBE from another service provider advertizing a web site, email address or utilizing any resource hosted on PosibleHost Hosting's servers, is prohibited. PosibleHost Hosting accounts or services may not be used to solicit customers from, or collect replies to, messages sent from another Internet Service Provider where those messages violate this Policy or that of the other provider.
Running Unconfirmed Mailing Lists. Subscribing email addresses to any mailing list without the express and verifiable permission of the email address owner is prohibited. All mailing lists run by PosibleHost Hosting customers must be Closed-loop ("Confirmed Opt-in"). The subscription confirmation message received from each address owner must be kept on file for the duration of the existence of the mailing list. Purchasing lists of email addresses from 3rd parties for mailing to from any PosibleHost Hosting-hosted domain, or referencing any PosibleHost Hosting account, is prohibited.
Operating an account on behalf of, or in connection with, or reselling any service to, persons or firms listed in the Spamhaus Register of Known Spam Operations (ROKSO) database at spamhaus.org.
We receive automatic reports from Spamhaus, AOL and SpamCop for our IP ranges. If there are more than three complaints logged against your site in one day, the site will be suspended until a resolution/explanation is made.