Hello @LewisJ. I believe that you may be asking about bringing in a mailing list of contacts to add to your account. Constant Contact is permission-based, which means that any contacts that you bring into your account must have given you either implied or express permission to receive mailings from you. You cannot email any purchased, rented, or appended lists of email addresses from any source or any distribution lists. I encourage you to view this FAQ that explains our Permission Policy further.
If you did want to grow your contact list, you can use the sign-up tools in your account to have new contacts add themselves to your list.
Hello @BilginY. I'm sorry that you haven't been able to send out emails. I looked into your account and it looks like you need to contact our Account Review team before you are able to send out any emails. Here is a link to their numbers and hours.
That was just a general question for community about mailing lists, not for use with Constant Contact.
Thank you for your reply!