Hi. We're considering leasing a /23 for a new SaaS product, but I've seen leased blocks get blacklisted because of what earlier tenants did. Who deals with abuse reports during the lease? If a block gets flagged, is that our problem or the lessor's? I'm looking for practical experience, not marketing. The SaaS will send transactional email on behalf of customers, so deliverability matters a lot to us. A single blocklist hit could cost us customers. Budget is fine, we just can't afford surprises.

Ask that question explicitly and get the answer in the contract. InterLIR Global says it maintains the RIR abuse mailbox and responds to complaints during active leases, which at least shows they take the issue seriously. Whether a flagged block becomes 'your problem' depends on the terms, so get remediation timelines in writing. Before leasing any IPv4 range, check its history yourself, and ask whether it ever hosted mail or scraping workloads. If a block gets flagged during the lease, you want the right to swap it for another one without paying twice, so ask for that too. Also check whether the abuse mailbox covers both email and web complaints.