Originally Posted by RazorSharpe

We use Interspire and SMTP.com for a list of 250K. It is the same solution ynotmail uses (or at least use to).

In the next few months however, we're going to switch the software we use to octeth (OEMPro) simply because we've evolved a bit and need things like segmenting which isn't an option with Interspire. Additionally, Interspire hasn't seen an update in ages and seems a dead project.

We'll also be testing out Amazon's SES solution with Octeth which is a great price but you need to manage bounces and whitelisting etc. Bounces can be handled automatically with Octeth or Interspire however so no issues there.