# DKIM-Signature header exists but is not valid

**URL:** <https://discourse.mailinabox.email/t/dkim-signature-header-exists-but-is-not-valid/1968>\
**Category:** Maintenance\
**Created:** [March 2, 2017, 6:58am UTC](https://discourse.mailinabox.email/t/dkim-signature-header-exists-but-is-not-valid/1968 "2017-03-02T06:58:36Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![alexweissman](https://discourse.mailinabox.email/user_avatar/discourse.mailinabox.email/alexweissman/32/525_2.png) [@alexweissman](https://discourse.mailinabox.email/u/alexweissman)\
**Post date:** [July 16, 2017, 9:09pm UTC](https://discourse.mailinabox.email/t/dkim-signature-header-exists-but-is-not-valid/1968/12 "2017-07-16T21:09:40Z")

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If you’re still struggling with 1024-bit DKIM key limits on an external DNS, you might want to consider using Cloudflare. You wouldn’t have to change your registrar, and they can read your current DNS records and automatically duplicate them on their own servers. Once you’re on Cloudflare, you can use the full 2048-bit DKIM key that MIAB generates.

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_[View the full topic](https://discourse.mailinabox.email/t/dkim-signature-header-exists-but-is-not-valid/1968)._