Kickbox connects to the CRM my company uses quickly and easily.
Checking contact lists, even though they number in the thousands, always takes less than 5/10 minutes, allowing us to easily export lists of contacts with various characteristics (those with typos, emails that are likely to be bounced, and lists of contacts that are verified as having deliverability). Review collected by and hosted on G2.com.
In general, I think the software is well-built and very simple to use, the only thing that could be improved would be to be able to see straight away which contacts the software detects as having errors, and to be able to modify them directly. This would allow us to confirm directly whether the contact remained Undeliverable or Unknown. Review collected by and hosted on G2.com.