Some email delivery services such as Constant Contact, Send in Blue and Mail Chimp and others will stipulate that you cannot use purchased lists in their systems. 

Here are details of some of the services that will send cold email to a Purchased List.

ClickBack:   Do you need an effective,  professional system to deliver U.S. CAN-SPAM ACT compliant commercial email messages to a PURCHASED LIST?  If so, consider using Clickback for delivery.

Sending email messages to a purchased list via Clickback for the sole purpose of generating B2B leads from your non-permission-based or purchased lists is no longer a problem. Now you can send U.S. CAN-SPAM compliant email campaigns through Email Lead Generation software – worry-free! However, Clickback will no longer send email messages to generic email addresses so for these please consider some of the alternatives. 

Hotsol: Bulk Email Marketing Service for Purchased Lists www.hotsol.net are a B2B bulk email marketing service that allows purchased lists. Deploy cold email campaigns to B2B non-opt in email lists.

Direct Aim Media: Bulk Cold Email Marketing Services https://www.directaimmedia.com/third-party-email-marketing.html

Self-Hosted Services:  Consider a self-hosted service like Interspire Email Marketer or Sendy.

Aged G-Suite Accounts: An aged G-Suite Gmail account allows established account holders to send up to 2000 emails per day from each G Suite account.

Other Services:  Check out Email Marketing Tips to find other email delivery services.

Alternatively simply Google “send cold emails” to find services that will send cold email messages to a purchased list

The information above is for general information purposes only.  While we endeavor to keep the information on these third parties up to date and correct, we make no representations or warranties of any kind regarding the reliability and suitability of these third-party services.