# Notification email (SPF; DKIM, reverse PTR records)

**URL:** https://meta.discourse.org/t/notification-email-spf-dkim-reverse-ptr-records/65660
**Category:** Support
**Created:** [2017年七月5日 14:01 UTC](https://meta.discourse.org/t/notification-email-spf-dkim-reverse-ptr-records/65660 "2017-07-05T14:01:57Z")
**Posts on this page:** 8
**Page:** 1

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### Author: ![mariolevitin](https://avatars.discourse-cdn.com/v4/letter/m/e5b9ba/32.png) [@mariolevitin](https://meta.discourse.org/u/mariolevitin)
#### Post date: [2017年七月5日 14:01 UTC](https://meta.discourse.org/t/notification-email-spf-dkim-reverse-ptr-records/65660/1 "2017-07-05T14:01:57Z")

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Next to notification email setting, it says that

> The from: email address used when sending all essential system emails. The domain specified here must have SPF, DKIM and reverse PTR records set correctly for email to arrive

I’ve only set SPF, but the emails are arriving without problems at least to Gmail. Do I need to set all these three records? And is there a documentation on how to do it.

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### Author: ![elijah](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/elijah/32/104055_2.png) [@elijah](https://meta.discourse.org/u/elijah)
#### Post date: [2017年七月5日 16:02 UTC](https://meta.discourse.org/t/notification-email-spf-dkim-reverse-ptr-records/65660/2 "2017-07-05T16:02:02Z")

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Each of the three is used during “Is this spam?” heuristic testing by recipients. The more you have, the better it looks. All of them involve DNS settings, so the how-tos are difficult to write here. Every provider has a different way to do them.

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### Author: ![mariolevitin](https://avatars.discourse-cdn.com/v4/letter/m/e5b9ba/32.png) [@mariolevitin](https://meta.discourse.org/u/mariolevitin)
#### Post date: [2017年七月5日 16:26 UTC](https://meta.discourse.org/t/notification-email-spf-dkim-reverse-ptr-records/65660/3 "2017-07-05T16:26:38Z")

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I understand, thank you.

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### Author: ![codinghorror](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/codinghorror/32/110067_2.png) [@codinghorror](https://meta.discourse.org/u/codinghorror)
#### Post date: [2017年七月5日 17:53 UTC](https://meta.discourse.org/t/notification-email-spf-dkim-reverse-ptr-records/65660/4 "2017-07-05T17:53:26Z")

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Use [https://www.mail-tester.com](https://www.mail-tester.com) to validate your email settings. Send a test mail to it via Admin, Email, Send test email.

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### Author: ![mariolevitin](https://avatars.discourse-cdn.com/v4/letter/m/e5b9ba/32.png) [@mariolevitin](https://meta.discourse.org/u/mariolevitin)
#### Post date: [2017年七月7日 07:19 UTC](https://meta.discourse.org/t/notification-email-spf-dkim-reverse-ptr-records/65660/5 "2017-07-07T07:19:20Z")

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this is great, thanks

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### Author: ![system](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/system/32/443519_2.png) [@system](https://meta.discourse.org/u/system)
#### Post date: [2019年六月26日 14:47 UTC](https://meta.discourse.org/t/notification-email-spf-dkim-reverse-ptr-records/65660/6 "2019-06-26T14:47:52Z")

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### Author: ![system](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/system/32/443519_2.png) [@system](https://meta.discourse.org/u/system)
#### Post date: [2022年十二月16日 11:38 UTC](https://meta.discourse.org/t/notification-email-spf-dkim-reverse-ptr-records/65660/7 "2022-12-16T11:38:47Z")

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### Author: ![JammyDodger](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/jammydodger/32/254611_2.png) [@JammyDodger](https://meta.discourse.org/u/JammyDodger)
#### Post date: [2022年十二月16日 11:46 UTC](https://meta.discourse.org/t/notification-email-spf-dkim-reverse-ptr-records/65660/8 "2022-12-16T11:46:36Z")

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