Email verification services are not typically recommended at SharpSpring. These services are often advertised as a solution to recipient lists of unknown integrity. If you've collected Email addresses without much verification at sign-up, such as typo'd addresses at point-of-sales, an Email verification service may help, just as an initial precaution.
"List cleaning" services typically run your list against their internal, proprietary list of "bad" addresses, some of which may be:
- A check for valid address syntax
- Their known bounced addresses
- Defunct domains
However, SharpSpring's expert Abuse and Deliverability teams consistently see senders explaining to have "cleaned" their lists with these services, but getting poor inboxing rates, and some even being outright blocked by anti-spam applications that recipient mail servers put up. There is often not much we can do in these cases; it's not that their list isn't "clean" enough, it's that they need to take a hard look at the permission recipients gave them.
The most important thing in email is permission. With permission, you never need to have your list "cleaned" by a third party service. At SharpSpring, we help our customers by only advising to send to recipients who have expressly opted-in. Starting with good permission, you just have to "clean" your list incrementally by removing bounced addresses, spam complaints, unsubscribes, and unengaged recipients as part of your own ongoing list management. We've found that senders with such lists have had consistently excellent deliverability.