Hard Bounce wrong calculation

I was given a notice by HubSpot that my hard bounce rate is 5.73% and triggered a warning; while in the analysis part, the hard bounce is only 4.9%. Any explanation for this?

Hi @hamedfadaly,

Could you share screenshots of the notice and the current number?

My hypothesis here’s that your email was still being delivered. At the time of the notice, the hard bounce rate was 5.73%. With more emails being successfully delivered shortly after you saw that number, this hard bounce rate went down to 4.9%.

Best regards

Thank you for responding, but this is not the case. I have had this issue since last Friday.

Hi @hamedfadaly,

Could you please share screenshots of what you’re looking at? There are multiple locations in HubSpot where this information is displayed so it’s hard to tell without having more details.

Best regards

Hi @hamedfadaly,

There is a date range filter applied to the your delivery metrics – I’d assume that this is where the discrepancy comes from. Can you check different date ranges (all time is likely the one).

In any case, the actual hard bounce rate (whether it’s 4 or 5%) is not the issue here. You might want to look into email verification tools before sending your next emails. With tools, you can “outsource” your hard bounces and identify them before they happen.

Best regards!

Hey @karstenkoehler

You are very right. Email Verification Tools are very much needed to remove Hard Bounce and Soft Bounce.

They run Syntax Check, Domain/MX Records Check, Spam Trap Detection, find blocklisted Email Addresses, and deep-level extended SMTP verifications.

Although it’s a tiny difference but it does affect me here, as I have received a warning notice, which resulted in suspending a previous HubSpot account when I received similar message before. Problem is I don’t outsource emails and all those sent by HubSpot are generated via website subscription forms or Facebook leads forms which are integrated with HubSpot. Nevertheless, bouncing rate is as you see, and for sure it’s nonsense to have that rate of wrong emails sources from our legal marketing tools. Moreover, I used email verifier and most of the opt-out list went through and had no problem. This has become a complicated issue, as I’m now warned that the email marketing will be suspended again, and I think I did all necessary to have this solved before, but all in vain.

Hi @hamedfadaly,

I understand your frustration, however I’m not HubSpot support. For context, HubSpot uses automated systems to make sure that all users are following HubSpot’s Acceptable Use Policy and Terms of Service. This process is important in protecting customers’ experience with the platform. The thresholds might seem strict but that’s entirely HubSpot’s decision.

To come back to your earlier question, I think that the discrepancy results from the different date range and the filter applied to your current view.

Best regards

Unfortunately not… This date range is since I started the account up to date.

I even got back to date before I created the account - which technically should be allowed - but surprisingly it’s the same.

Hi @hamedfadaly,

This might be a bug in the tool then. Unfortunately, it likely won’t affect how HubSpot is assessing your email performance.

Best regards!