Hello,
Are you trying to send a lot of email using your ISP or a free email service provider?
Most likely you will be blocked becuase you are going over their expectations for normal usage sending limits.
If you are sending email newsletters try a service such as MailChimp that also has great extras such as Email Templates, Mailing List Management, and Free Sending for small mailing lists.
If you have your own mail program and need a cheap high volume smtp sending service try LuxSci.
Are you trying to send a lot of email using your ISP or a free email service provider?
Most likely you will be blocked becuase you are going over their expectations for normal usage sending limits.
If you are sending email newsletters try a service such as MailChimp that also has great extras such as Email Templates, Mailing List Management, and Free Sending for small mailing lists.
If you have your own mail program and need a cheap high volume smtp sending service try LuxSci.