--- title: How Many DKIM Records Can a Domain Have? description: DKIM record limits for a domain. --- [Skip to content](https://knowledgebase.mxtoolbox.com/home/how-many-dkim-records-can-a-domain-have#main-content) [Request Support](https://knowledgebase.mxtoolbox.com/home/kb-tickets/new?hsLang=en) [![](https://knowledgebase.mxtoolbox.com/hs-fs/hubfs/logo.gif.png?width=110&height=27&name=logo.gif.png)](https://mxtoolbox.com/) - [Help Knowledgebase](https://knowledgebase.mxtoolbox.com/home/) - [Delivery Center Home](https://delivery.mxtoolbox.com/) - [Monitoring Home](https://mxtoolbox.com/monitoring) - [DMARC Knowledgebase](https://mxtoolbox.com/DMARC/knowledgebase) - [Status Page](https://mxtoolbox.statuspage.io/) Open main navigation Close main navigation - [Help Knowledgebase](https://knowledgebase.mxtoolbox.com/home/) - [Delivery Center Home](https://delivery.mxtoolbox.com/) - [Monitoring Home](https://mxtoolbox.com/monitoring) - [DMARC Knowledgebase](https://mxtoolbox.com/DMARC/knowledgebase) - [Status Page](https://mxtoolbox.statuspage.io/) - [Request Support](https://knowledgebase.mxtoolbox.com/home/kb-tickets/new) How can we help you? - There are no suggestions because the search field is empty. 1. [MxToolbox Help Center](https://knowledgebase.mxtoolbox.com/home?hsLang=en) 2. [Delivery Center](https://knowledgebase.mxtoolbox.com/home/delivery-center?hsLang=en) 3. [DKIM Configuration & Performance](https://knowledgebase.mxtoolbox.com/home/delivery-center?hsLang=en#dkim-configuration-performance) # How Many DKIM Records Can a Domain Have? ## This article explains if the number of your DKIM records is limited. A domain can have **multiple DKIM records**, with no limit set by the DKIM standard itself. As long as each record uses a **unique selector** (for example, `selector1._domainkey` and `selector2._domainkey`), multiple email services can authenticate mail from the same domain without conflict. In practice, the only limits come from your **DNS provider**, which may cap the total number of TXT records per domain—typically allowing dozens or even hundreds. ### Key Considerations - **Unique selectors are required:** Each DKIM record must have its own selector so receiving servers can find the correct public key. - **DNS provider limits apply:** While DKIM allows unlimited records, your DNS host may enforce TXT record limits. - **Performance impact is minimal:** DKIM lookups are generally lightweight; DNS performance issues usually occur only with excessive or poorly managed records. ### When You Need Multiple DKIM Records - You use **multiple email platforms** (e.g., marketing, support, billing, or CRM tools). - You want to **rotate DKIM keys** regularly for security. - You separate **transactional and marketing** email streams. 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