Salesforge Bounce Shield On but Emails Still Bouncing: Why and What to Do

If emails are bouncing from Salesforge with Bounce Shield switched on, pause the sequence, export the bounces with their messages, and verify every lead that has not been emailed yet with a real mailbox check. Bounce Shield, as Salesforge describes it, screens for obvious problems, not for a mailbox that is well formed but does not exist. SimpleVerifier Pro covers that check for $39 a month: the first 100,000 checks a month at full speed, then slower, never cut off. Try 100 free checks first, no card.

The Salesforge description here comes from its Bounce Shield help article, read on 9 November 2026. Confirm in your own account, since settings change.

What Bounce Shield says it does

Salesforge's help article says Bounce Shield checks for common indicators of invalid emails, such as incorrect syntax and non-existent domains. It also uses bounce history: if someone or some sequence already had a bounce on that address in Salesforge's own database, that counts too.

Those are useful filters. A missing "@", a typo in a domain that does not exist, an address that has already hard bounced for another user: all of them get caught before you pay a bounce for them.

The article does not give a bounce-rate threshold and does not say Bounce Shield pauses a sequence or a mailbox when bounces climb. Salesforge's marketing blog and other pages give various pause guidance, and the numbers differ between pages, so there is no single official number we can hand you. Pick your own stop line.

Why bounces still happen with the filter on

The gap is between "looks valid" and "exists".

• The mailbox does not exist. first.last@realcompany.com has correct syntax and a live domain, but the person left, or the pattern was a guess. Only a mailbox-level check against the receiving server tells you. That is a different test from syntax and domain checks.
• First time anyone emails it. Bounce history only helps for addresses someone has already bounced. A fresh dead address has no history.
• Catch-all domains. The server accepts everything at the door and may reject afterwards, so the bounce arrives late. See catch-all leads in sequences and send to catch-all emails.
• Policy blocks. Some bounces say nothing about the address. They say the receiving server refused your mail because of your domain, your authentication or your reputation. See list problem or domain problem.
• Full or disabled mailboxes. Temporary failures that repeat. See mailbox full bounce.

What to do in the next hour

1. Pause the sequence. Spread-out sending across mailboxes means the damage is spread out too, but it keeps growing as long as the sequence runs.
2. Export the bounces and their messages.
3. Sort them. Mailbox not found, domain not found, full mailbox, policy or reputation block. The bounce message analyzer helps decode the codes.
4. Check hotspots. If a few domains hold most of the bounces, the bounce domain hotspot finder shows it.
5. Verify the unsent leads. Upload the unsent contacts to the verify page or the CSV email verifier.

Step-by-step fix

1. Suppress the hard bounces so imports cannot add them back. See cold email suppression lists.
2. Verify before the lead enters Salesforge, not after. Bounce Shield then becomes your second line, not your only one.
3. Split the verified file. Valid goes to the main sequence. Risky and catch-all go to a smaller sequence you can stop independently. Size it with the catch-all send limit calculator.
4. Check each mailbox's recent bounce count. If one inbox carries most of the bounces, rest it and read cold email bounce budget per inbox.
5. If the messages were policy blocks, slow down. Follow restarting sending after a block. A cleaner list will not fix a block that is about your sender.
6. Resume small and look at the next day's bounce count before raising volume.

If you already verify and still see bounces, verified emails still bouncing explains what remains.

Prevention: verify before every send

Treat the built-in shield as a convenience, and the real gate as a mailbox-level verification of each file before it enters the tool. Keep a written bounce line, log each day with the daily bounce rate tracker, and use the bounce rate calculator so the number is calculated the same way every time.

Do not rely on any checker's reported accuracy, ours included. Test on a slice instead: verify part of the file, send to the valid addresses and compare against your recent unverified sends.

A worked example of the triage

Imagine a sequence running across several mailboxes with Bounce Shield enabled, and a few days in, bounces are climbing. You export them and read the messages. Most say the recipient mailbox does not exist, and the addresses all look like first.last patterns at companies where the format was guessed. None were malformed, and none sat on a dead domain, so Bounce Shield as described had nothing to flag. None had bounced for anyone before, so the history check had nothing either.

That is the typical shape: well-formed, live-domain, previously unseen, and wrong. A mailbox-level check catches it because it asks the receiving server rather than inspecting the string. The second pile, if you have one, is the policy bounces: messages naming your sending domain or reputation. Bounce Shield's described checks do not touch those at all, because they are about you, not the address.

Mistakes to avoid

• Assuming the shield replaced verification. The help page describes specific checks; it makes no claim to confirm a mailbox exists.
• Treating risky as safe. Catch-all and unknown results are not bad addresses, but they are not confirmed either. Send them in their own small batch.
• Letting one inbox carry the bounces. Salesforge spreads sends across mailboxes, so the bounce count per mailbox may look low even when the total is high. Add the numbers up.
• Raising volume while bounces are unexplained. Hold it until you know the cause.

How to tell what your list looks like before the next send

Take a slice of the file you plan to import, a few hundred rows is enough, and run it through the verify page. The result splits into valid, risky and invalid, each with a reason. Compare the invalid share with what Bounce Shield would have let through. If the slice shows a meaningful number of invalid addresses, the whole file deserves a full pass. If it shows almost none, your bounces are more likely coming from the sending side, and the next step is authentication and volume, not the list.

Keep the verification report. Next time a bounce spike appears, you can see whether the leads were marked valid, risky or invalid when they went in, which narrows the cause quickly.

What it costs

SimpleVerifier Pro is $39 a month. The first 100,000 checks a month run at full speed, then slower, never cut off. You can try 100 free checks first, no card. See pricing.

Bottom line

Bounce Shield filters malformed addresses, dead domains and known earlier bounces. It does not replace a mailbox-level check, and per its help page it does not set a bounce threshold for you. Pause, read the bounce messages, verify the unsent leads and restart in small batches.