--- title: Blog | Jonas description: Explore tips on HubSpot Operations, CRM hygiene and especially HubSpot merging & deduplication --- [Skip to content](https://koalify.io/blog/author/jonas#main-content) [![rectangle\_long\_koala\_with\_name\_bold\_200\_125\_white](https://koalify.io/hubfs/rectangle_long_koala_with_name_bold_200_125_white.png)](https://koalify.io) - Products Show submenu for Products - [Deduplication](https://koalify.io) - [Email Validation](https://koalify.io/hubspot-email-validation) - Pricing Show submenu for Pricing - [Deduplication](https://koalify.io/pricing) - [Email Validation](https://koalify.io/hubspot-email-validation-pricing-koalify) - [Partners](https://koalify.io/partners) - [Blog](https://koalify.io/blog) - Knowledge base Show submenu for Knowledge base - [Deduplication](https://koalify.io/knowledge-base) - [Email Validation](https://koalify.io/email-validation-knowledge-base) - Products Show submenu for Products - [Deduplication](https://koalify.io) - [Email Validation](https://koalify.io/hubspot-email-validation) - Pricing Show submenu for Pricing - [Deduplication](https://koalify.io/pricing) - [Email Validation](https://koalify.io/hubspot-email-validation-pricing-koalify) - [Partners](https://koalify.io/partners) - [Blog](https://koalify.io/blog) - Knowledge base Show submenu for Knowledge base - [Deduplication](https://koalify.io/knowledge-base) - [Email Validation](https://koalify.io/email-validation-knowledge-base) ![menu-toggle](https://21645388.fs1.hubspotusercontent-na1.net/hubfs/21645388/menu-toggle.svg) ![menu-close](https://21645388.fs1.hubspotusercontent-na1.net/hubfs/21645388/menu-close.svg) [Get Started Free](https://api.koalify.io/hubspot/install?utm_source=koalify&utm_medium=website&utm_campaign=navigation) ##### KOALIFY BLOG ## HubSpot Data Quality & Deduplication Blog Practical guides, best practices, and tutorials on HubSpot deduplication, duplicate management, bulk merging, and CRM data quality. Learn how to find, manage, and remove duplicates in HubSpot across contacts, companies, deals, and more. ![How to Undo a Merge in HubSpot (Including Bulk Unmerge)](https://koalify.io/hs-fs/hubfs/How%20to%20undo%20a%20merge%20in%20HubSpot%20(bulk%20unmerge).png?width=370&height=220&name=How%20to%20undo%20a%20merge%20in%20HubSpot%20(bulk%20unmerge).png) ###### [How to Undo a Merge in HubSpot (Including Bulk Unmerge)](https://koalify.io/blog/how-to-undo-a-merge-in-hubspot-bulk-unmerge) By [Jonas](https://koalify.io/blog/author/jonas) 21 October, 2026 A sales rep messages you on Monday morning: the account history for one of their biggest customers... [Read More](https://koalify.io/blog/how-to-undo-a-merge-in-hubspot-bulk-unmerge) ![HubSpot Database Cleanup: A 5-Step Plan to Get (and Stay) Clean](https://koalify.io/hs-fs/hubfs/HubSpot%20database%20cleanup%20a%20five-phase%20plan%20to%20get%20clean%20and%20stay%20clean.png?width=370&height=220&name=HubSpot%20database%20cleanup%20a%20five-phase%20plan%20to%20get%20clean%20and%20stay%20clean.png) ###### [HubSpot Database Cleanup: A 5-Step Plan to Get (and Stay) Clean](https://koalify.io/blog/hubspot-database-cleanup-a-5-step-plan-to-get-and-stay-clean) By [Jonas](https://koalify.io/blog/author/jonas) 16 October, 2026 Your campaign numbers don't match what sales sees in the pipeline. Sales can't tell which of the... [Read More](https://koalify.io/blog/hubspot-database-cleanup-a-5-step-plan-to-get-and-stay-clean) ![SPF, DKIM and DMARC in HubSpot: a setup checklist for marketing email](https://koalify.io/hs-fs/hubfs/SPF%2c%20DKIM%20and%20DMARC%20in%20HubSpot%20a%20setup%20checklist%20for%20marketing%20email.png?width=370&height=220&name=SPF%2c%20DKIM%20and%20DMARC%20in%20HubSpot%20a%20setup%20checklist%20for%20marketing%20email.png) ###### [SPF, DKIM and DMARC in HubSpot: a setup checklist for marketing email](https://koalify.io/blog/hubspot-spf-dkim-dmarc-setup) By [Jonas](https://koalify.io/blog/author/jonas) 14 October, 2026 You inherited a HubSpot portal that's been sending marketing email for years. Nobody can tell you... [Read More](https://koalify.io/blog/hubspot-spf-dkim-dmarc-setup) ![Why your HubSpot emails are going to spam (and how to fix it)](https://koalify.io/hs-fs/hubfs/Why%20your%20HubSpot%20emails%20are%20going%20to%20spam%20(and%20how%20to%20fix%20it).png?width=370&height=220&name=Why%20your%20HubSpot%20emails%20are%20going%20to%20spam%20(and%20how%20to%20fix%20it).png) ###### [Why your HubSpot emails are going to spam (and how to fix it)](https://koalify.io/blog/hubspot-emails-going-to-spam) By [Jonas](https://koalify.io/blog/author/jonas) 12 October, 2026 Your open rate was 28% last month. This week's newsletter came in at 9%. HubSpot says 98%... [Read More](https://koalify.io/blog/hubspot-emails-going-to-spam) ![How to unbounce a contact in HubSpot](https://koalify.io/hs-fs/hubfs/If%20the%20address%20was%20right%20unbounce%20it%20in%20HubSpot.png?width=370&height=220&name=If%20the%20address%20was%20right%20unbounce%20it%20in%20HubSpot.png) ###### [How to unbounce a contact in HubSpot](https://koalify.io/blog/unbounce-contact-hubspot) By [Jonas](https://koalify.io/blog/author/jonas) 9 October, 2026 A customer replies to a sales email asking why they never got your newsletter. You check their... [Read More](https://koalify.io/blog/unbounce-contact-hubspot) ![HubSpot Email validation failed vs Not a valid email address](https://koalify.io/hs-fs/hubfs/HubSpot%20Email%20validation%20failed%20when%20you%20send%20or%20schedule%20a%20marketing%20email.png?width=370&height=220&name=HubSpot%20Email%20validation%20failed%20when%20you%20send%20or%20schedule%20a%20marketing%20email.png) ###### [HubSpot Email validation failed vs Not a valid email address](https://koalify.io/blog/hubspot-email-validation-failed) By [Jonas](https://koalify.io/blog/author/jonas) 6 October, 2026 Your newsletter is ready. You click Schedule, and HubSpot answers with a red banner: **Error: Email...** [Read More](https://koalify.io/blog/hubspot-email-validation-failed) ![Sent, delivered, dropped, bounced: HubSpot email statuses explained](https://koalify.io/hs-fs/hubfs/Sent%2c%20delivered%20dropped%20bounced%20HubSpot%20email%20statuses%20explained.png?width=370&height=220&name=Sent%2c%20delivered%20dropped%20bounced%20HubSpot%20email%20statuses%20explained.png) ###### [Sent, delivered, dropped, bounced: HubSpot email statuses explained](https://koalify.io/blog/sent-delivered-dropped-bounced-hubspot-email-statuses-explained) By [Jonas](https://koalify.io/blog/author/jonas) 5 October, 2026 A sales rep messages you: "Our biggest prospect says they never got the webinar invite." You open... [Read More](https://koalify.io/blog/sent-delivered-dropped-bounced-hubspot-email-statuses-explained) ![The HubSpot email health tool: what your score means and what it misses](https://koalify.io/hs-fs/hubfs/What%20your%20email%20health%20score%20means.png?width=370&height=220&name=What%20your%20email%20health%20score%20means.png) ###### [The HubSpot email health tool: what your score means and what it misses](https://koalify.io/blog/hubspot-email-health-tool-what-your-score-means) By [Jonas](https://koalify.io/blog/author/jonas) 1 October, 2026 Your HubSpot email health score dropped from 8 to 6 last month. Is that a subject-line problem, a... [Read More](https://koalify.io/blog/hubspot-email-health-tool-what-your-score-means) ![What graymail is, and how it quietly kills HubSpot deliverability](https://koalify.io/hs-fs/hubfs/koalify-what-is-graymail.png?width=370&height=220&name=koalify-what-is-graymail.png) ###### [What graymail is, and how it quietly kills HubSpot deliverability](https://koalify.io/blog/what-graymail-is-and-how-it-quietly-kills-hubspot-deliverability) By [Jonas](https://koalify.io/blog/author/jonas) 30 September, 2026 Nobody complains about your monthly product update. Nobody reports it as spam, and hardly anyone... [Read More](https://koalify.io/blog/what-graymail-is-and-how-it-quietly-kills-hubspot-deliverability) ![UNBOUND 2026: people, talks and a $1,000 pin hunt](https://koalify.io/hs-fs/hubfs/Tim%20%26%20Jonas%20on%20partner%20day.jpeg?width=370&height=220&name=Tim%20%26%20Jonas%20on%20partner%20day.jpeg) ###### [UNBOUND 2026: people, talks and a $1,000 pin hunt](https://koalify.io/blog/unbound-2026-people-talks-and-a-1000-pin-hunt) By [Jonas](https://koalify.io/blog/author/jonas) 29 September, 2026 Two weeks on, and we're still buzzing from Boston. UNBOUND 2026 was the first edition under its new... [Read More](https://koalify.io/blog/unbound-2026-people-talks-and-a-1000-pin-hunt) ###### Blog Sidebar ###### Search Search ###### Category - [HubSpot Data Quality](https://koalify.io/blog/tag/hubspot-data-quality) - [HubSpot Email Validation](https://koalify.io/blog/tag/hubspot-email-validation) - [HubSpot Revenue Operations](https://koalify.io/blog/tag/hubspot-revenue-operations) - [HubSpot Integration Duplicates](https://koalify.io/blog/tag/hubspot-integration-duplicates) - [HubSpot Associations](https://koalify.io/blog/tag/hubspot-associations) - [HubSpot Deduplication](https://koalify.io/blog/tag/hubspot-deduplication) ###### Popular Post - [HubSpot best practices for contacts that leave a company](https://koalify.io/blog/hubspot-best-practices-for-contacts-that-leave-a-company) - [How to Bulk Merge HubSpot Duplicates: Contacts, Companies, Deals and More](https://koalify.io/blog/how-to-bulk-merge-hubspot-duplicates-contacts-companies-more) - [How to Merge Companies in HubSpot (Safely, Manually or in Bulk)](https://koalify.io/blog/how-to-merge-companies-in-hubspot-manual-or-in-bulk) - [HubSpot Deduplication: How to Find, Manage, and Remove Duplicates in HubSpot](https://koalify.io/blog/hubspot-deduplication-the-ultimate-guide-to-zero-duplicates-in-hubspot) - [How to Merge Duplicate Contacts in HubSpot Without Losing Data](https://koalify.io/blog/how-to-merge-contacts-in-hubspot-manual-or-in-bulk) ###### Page: [1](https://koalify.io/blog/author/jonas/page/1) [2](https://koalify.io/blog/author/jonas/page/2) [3](https://koalify.io/blog/author/jonas/page/3) [4](https://koalify.io/blog/author/jonas/page/4) [5](https://koalify.io/blog/author/jonas/page/5) ... 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