While we understand that customers have completely legitimate reasons for operating small mailing lists (which we have no problem with) on our shared servers, we try to discourage the hosting of bulk mailing lists which have thousands of subscribers and are mass-mailed on a regular basis.
In a shared web hosting environment you need to remember that you are sharing the server with many other customers. Sending out a huge volume of email messages can cause serious load problems and impact service for other customers as well as yourself. There is also the problem of the server being blacklisted because some of the recipients of your mailing reported it as being unsolicited (SPAM).
We ask that customers who do need to run a small mailing list send their messages out in batches instead of all in one go.
By using batch sending it means that your messages are sent out in small ‘batches’ so as not to overload the mail server. For example, if you had a mailing list with 500 subscribers then you could send your mailing out in batches of 50 with a 30 minute delay between each batch going out. This means that all of your messages would be sent out over a five hour period using a controlled delivery method.
We also ask that any mailing list being operated from our servers is double opt-in and complies with relevant anti-spam legislation (e.g. CAN-SPAM Act of 2003) to ensure that your subscriber base is 100% solicited in order to remove the risk of the server being blacklisted.
Please be sure to check out the email sending limits on our shared servers as explained in our AUP: http://www.rochen.com/legal/aup/