--- 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. ![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/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/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) ![Unengaged contacts in HubSpot: why sending to them hurts everyone](https://koalify.io/hs-fs/hubfs/Unengaged%20contacts%20in%20HubSpot%20why%20sending%20to%20them%20hurts%20everyone.png?width=370&height=220&name=Unengaged%20contacts%20in%20HubSpot%20why%20sending%20to%20them%20hurts%20everyone.png) ###### [Unengaged contacts in HubSpot: why sending to them hurts everyone](https://koalify.io/blog/unengaged-contacts-in-hubspot-why-sending-to-them-hurts) By [Jonas](https://koalify.io/blog/author/jonas) 25 September, 2026 Someone on your team wants the whole database in the monthly newsletter. It's 80,000 contacts.... [Read More](https://koalify.io/blog/unengaged-contacts-in-hubspot-why-sending-to-them-hurts) ![Building for HubSpot: What We Learned Listing Two Apps in the Marketplace](https://koalify.io/hs-fs/hubfs/Pass%20It%20On%20Lessons%20From%20Both%20Sides%20of%20a%20Marketplace%20Listing%20Review.png?width=370&height=220&name=Pass%20It%20On%20Lessons%20From%20Both%20Sides%20of%20a%20Marketplace%20Listing%20Review.png) ###### [Building for HubSpot: What We Learned Listing Two Apps in the Marketplace](https://koalify.io/blog/building-for-hubspot-what-we-learned-listing-two-apps-in-the-marketplace) By [Jonas](https://koalify.io/blog/author/jonas) 24 September, 2026 You've built the app, the OAuth flow works, and you're ready to submit. Then the review comes back... [Read More](https://koalify.io/blog/building-for-hubspot-what-we-learned-listing-two-apps-in-the-marketplace) ![HubSpot sender reputation: what it is, how to check it, and how to rebuild it](https://koalify.io/hs-fs/hubfs/How%20to%20check%20your%20sender%20reputation%20in%20HubSpot.png?width=370&height=220&name=How%20to%20check%20your%20sender%20reputation%20in%20HubSpot.png) ###### [HubSpot sender reputation: what it is, how to check it, and how to rebuild it](https://koalify.io/blog/hubspot-sender-reputation-how-to-check-it-and-rebuild-it) By [Jonas](https://koalify.io/blog/author/jonas) 21 September, 2026 Your newsletter used to get a 30% open rate. The last three sends came in at 14%, 11% and 12%.... [Read More](https://koalify.io/blog/hubspot-sender-reputation-how-to-check-it-and-rebuild-it) ![How to validate imported emails in HubSpot before they hit a list](https://koalify.io/hs-fs/hubfs/How%20to%20validate%20imported%20emails%20in%20HubSpot%20before%20they%20hit%20a%20list%20with%20error.png?width=370&height=220&name=How%20to%20validate%20imported%20emails%20in%20HubSpot%20before%20they%20hit%20a%20list%20with%20error.png) ###### [How to validate imported emails in HubSpot before they hit a list](https://koalify.io/blog/how-to-validate-imported-emails-in-hubspot-before-they-hit-a-list) By [Jonas](https://koalify.io/blog/author/jonas) 9 September, 2026 You've just imported a list into HubSpot. Maybe it came across from your old CRM during a... [Read More](https://koalify.io/blog/how-to-validate-imported-emails-in-hubspot-before-they-hit-a-list) ![Catch-all, role-based, disposable: what your HubSpot email validation results actually mean](https://koalify.io/hs-fs/hubfs/Catch-all%2c%20role-based%2c%20disposable%20what%20your%20HubSpot%20email%20validation%20results%20actually%20mean.png?width=370&height=220&name=Catch-all%2c%20role-based%2c%20disposable%20what%20your%20HubSpot%20email%20validation%20results%20actually%20mean.png) ###### [Catch-all, role-based, disposable: what your HubSpot email validation results actually mean](https://koalify.io/blog/catch-all-role-based-disposable-emails-hubspot) By [Jonas](https://koalify.io/blog/author/jonas) 3 September, 2026 You finally ran a validation pass over your HubSpot list, and now you're looking at a column of... [Read More](https://koalify.io/blog/catch-all-role-based-disposable-emails-hubspot) ![HubSpot soft bounce: what it is and how to fix it](https://koalify.io/hubfs/HubSpot%20soft%20bounce%20what%20it%20is%20and%20how%20to%20fix%20it.svg) ###### [HubSpot soft bounce: what it is and how to fix it](https://koalify.io/blog/hubspot-soft-bounce) By [Jonas](https://koalify.io/blog/author/jonas) 25 August, 2026 A soft bounce is the one people ignore. Unlike a hard bounce, the address is real, HubSpot keeps... [Read More](https://koalify.io/blog/hubspot-soft-bounce) ![HubSpot hard bounce: what it is and how to fix it](https://koalify.io/hubfs/HubSpot%20hard%20bounce%20what%20it%20is%20and%20how%20to%20fix%20it%20with%20blur.svg) ###### [HubSpot hard bounce: what it is and how to fix it](https://koalify.io/blog/hubspot-hard-bounce) By [Jonas](https://koalify.io/blog/author/jonas) 25 August, 2026 You sent a campaign, and a chunk of it came back marked "hard bounce." Now those contacts have a... [Read More](https://koalify.io/blog/hubspot-hard-bounce) ###### Blog Sidebar ###### Search Search ###### Category - [HubSpot Data Quality](https://koalify.io/blog/tag/hubspot-data-quality) - [HubSpot Revenue Operations](https://koalify.io/blog/tag/hubspot-revenue-operations) - [HubSpot Integration Duplicates](https://koalify.io/blog/tag/hubspot-integration-duplicates) - [HubSpot Email Validation](https://koalify.io/blog/tag/hubspot-email-validation) - [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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