lets add everything missing from why it matters and how to that isn't already in report text
Accept-All is high. Be smart about how you read "delivered"
About 21% of this sample is on Accept-All servers. For B2B outreach this is normal (lots of corporate Microsoft 365 / Mimecast / Proofpoint behind those domains), but it means a "delivered" status from your sending tool is NOT the same as "the inbox actually exists." Mailbox providers will silently drop unknown addresses on accept-all servers, and those failures show up as zero engagement, not as bounces. Watch click rates per domain. Accept-All domains with consistent 0% clicks across multiple campaigns are likely dead boxes.
Accept-All
412 emails
Accept-all mail servers say yes at the connection level without revealing whether a specific mailbox is active. Our checks can verify some of these addresses directly, but not all of them depending on how the server is configured. Consumer providers like Yahoo and AOL often run in accept-all mode, and on business domains this usually comes from security gateways such as Proofpoint, Mimecast, or Barracuda sitting in front of the real inbox. We tag every address on an accept-all server so you can track them as their own segment and watch how they behave in your campaigns.
Segment these addresses into their own group and send to them separately from your other contacts. Track their engagement (opens, clicks, replies) over a few sends. Addresses that engage can be moved into your main list with confidence. Addresses that never engage after multiple sends are safe to segment aside for re-engagement campaigns or suppression, depending on your goals.
66% of this list is in great shape to send to
For a combined tax marketing and booking customer list, the validation profile is healthy. Only 29 of 598 addresses (4.8%) need removal. The Monitor segment is mostly Accept-All on consumer providers like Yahoo and Hotmail, where the addresses are real but the providers respond conservatively to validation queries. These should still be sent to.
Accept-All
123 emails
Accept-all mail servers say yes at the connection level without revealing whether a specific mailbox is active. Our checks can verify some of these addresses directly, but not all of them depending on how the server is configured. Consumer providers like Yahoo and AOL often run in accept-all mode, and on business domains this usually comes from security gateways such as Proofpoint, Mimecast, or Barracuda sitting in front of the real inbox. We tag every address on an accept-all server so you can track them as their own segment and watch how they behave in your campaigns.
Segment these addresses into their own group and send to them separately from your other contacts. Track their engagement (opens, clicks, replies) over a few sends. Addresses that engage can be moved into your main list with confidence. Addresses that never engage after multiple sends are safe to segment aside for re-engagement campaigns or suppression, depending on your goals.
Accept-All
19,281 emails
Accept-all mail servers say yes at the connection level without revealing whether a specific mailbox is active. Our checks can verify some of these addresses directly, but not all of them depending on how the server is configured. Consumer providers like Yahoo and AOL often run in accept-all mode, and on business domains this usually comes from security gateways such as Proofpoint, Mimecast, or Barracuda sitting in front of the real inbox. We tag every address on an accept-all server so you can track them as their own segment and watch how they behave in your campaigns.
Segment these addresses into their own group and send to them separately from your other contacts. Track their engagement (opens, clicks, replies) over a few sends. Addresses that engage can be moved into your main list with confidence. Addresses that never engage after multiple sends are safe to segment aside for re-engagement campaigns or suppression, depending on your goals.
all incoming mail at the gateway but may silently discard messages that don't pass security checks.
Monitor carefully. Military domains accept all email at the gate (accept-all) but have aggressive internal filtering. Bounces may not be reported, making it hard to detect delivery failures.
Accept-All
1,320 emails
Accept-all mail servers say yes at the connection level without revealing whether a specific mailbox is active. Our checks can verify some of these addresses directly, but not all of them depending on how the server is configured. Consumer providers like Yahoo and AOL often run in accept-all mode, and on business domains this usually comes from security gateways such as Proofpoint, Mimecast, or Barracuda sitting in front of the real inbox. We tag every address on an accept-all server so you can track them as their own segment and watch how they behave in your campaigns.
Segment these addresses into their own group and send to them separately from your other contacts. Track their engagement (opens, clicks, replies) over a few sends. Addresses that engage can be moved into your main list with confidence. Addresses that never engage after multiple sends are safe to segment aside for re-engagement campaigns or suppression, depending on your goals.
✓
3,159 addresses are clean and safe to send first
The Keep bucket is deliverable-only. Every risky, low-confidence, and accept-all-without-a-website address has been pulled out into Monitor or Suppress, so what is left in Keep is what a fresh sender can lead with.
One ask: if any of these bounce because the mailbox genuinely does not exist (a true "no such user" bounce, not a blocklist or content block), tell us at lists@reviewmyemails.com and we will credit 2 emails back. It helps us learn and improve the checks, and you get the credits.
1,885 addresses are real but need care (Monitor)
Monitor is where the address is real but comes with a caveat, and the decision on each is yours. Some sit on accept-all servers: we confirmed the domain is live and its mail server responds, but the server says "yes" to every address at the connection level, so the one specific mailbox cannot be confirmed active by any tool. That is their server's setting, not a gap in our check. Another 1,334 verified as real but with lower delivery confidence. Many of these domains also sit behind security gateways like Proofpoint, Mimecast and Barracuda that only let mail through from senders they already trust, so even a real, active inbox can block a cold sender until you are recognised or allowlisted. A few carry other flags (breach history, a shared role inbox, heavy mail volume), each explained per label below.
Go label by label below and decide what fits your risk tolerance: som
e are worth sending to with care, others you may prefer to hold back. Either is a valid choice.
Accept-All
1,416 emails
These sit on a server that says "yes" to every address at the connection level, so we cannot confirm whether the individual mailbox actually exists. That is the key difference from Low Delivery Confidence, where we did get a mailbox-level answer. Consumer providers like Yahoo and AOL run this way, and on business domains it usually comes from a security gateway (Proofpoint, Mimecast, Barracuda) sitting in front of the real inbox. We tag every accept-all address so you can track them as their own segment.
Do not blast these. Sprinkle a few into your sends over time rather than hitting them all at once, use a shorter sequence with bigger gaps between emails, and cut them off faster if they show no engagement. The ones that do engage can move into your main list; the rest you set aside.
Low Delivery Confidence
1,281 emails
We checked these mailboxes and they came back real, but with a "risky" signal. This is the key difference from Accept-All: with Accept-All the server accepts everything and hides whether the specific mailbox exists, whereas here we did get a mailbox-level answer, it just was not a clean pass. It usually means the domain or provider has a weaker sending reputation, or the domain is small and low-traffic.
These are worth sending to, just keep a close eye on them: track opens and bounces, and drop any that hard-bounce on the first touch.
Yahoo and AOL cannot be individually verified, and that is normal
These providers run accept-all servers: they say "yes" to every address at the connection level, so no tool can confirm one specific mailbox. That is their server's design, not a gap in the check. Since these subscribers opted in, keep them, but Yahoo and AOL are strict on complaints, so send consistently and prune anyone who never opens.
Accept-All
609 emails
Accept-all mail servers say yes at the connection level without revealing whether a specific mailbox is active. Our checks can verify some of these addresses directly, but not all of them depending on how the server is configured. Consumer providers like Yahoo and AOL often run in accept-all mode, and on business domains this usually comes from security gateways such as Proofpoint, Mimecast, or Barracuda sitting in front of the real inbox. We tag every address on an accept-all server so you can track them as their own segment and watch how they behave in your campaigns.
Segment these addresses into their own group and send to them separately from your other contacts. Track their engagement (opens, clicks, replies) over a few sends. Addresses that engage can be moved into your main list with confidence. Addresses that never engage after multiple sends are safe to segment aside for re-engagement campaigns or suppression, depending on your goals.