# How customize email header h= of DKIM-Signature? **URL:** \ **Category:** Product Support\ **Created:** [February 20, 2020, 4:50pm UTC](https://forum.mautic.org/t/how-customize-email-header-h-of-dkim-signature/12989 "2020-02-20T16:50:04Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![volneiMR](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/volneimr/32/1752_2.png) [@volneiMR](https://forum.mautic.org/u/volneiMR)\ **Post date:** [February 20, 2020, 4:50pm UTC](https://forum.mautic.org/t/how-customize-email-header-h-of-dkim-signature/12989/1 "2020-02-20T16:50:04Z")
**Your software** My Mautic version is: v2.15.3 My PHP version is: PHP Version 7.2.26 **Your problem** My problem is: how customize email header h= of DKIM-Signature? ---
**Author:** ![ekke](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/ekke/32/296_2.png) [@ekke](https://forum.mautic.org/u/ekke)\ **Post date:** [February 20, 2020, 5:10pm UTC](https://forum.mautic.org/t/how-customize-email-header-h-of-dkim-signature/12989/2 "2020-02-20T17:10:14Z")
DKIM should be added through the email provider (e.g. Amazon SES, Mailjet, … or even Gmail) ---
**Author:** ![volneiMR](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/volneimr/32/1752_2.png) [@volneiMR](https://forum.mautic.org/u/volneiMR)\ **Post date:** [February 20, 2020, 5:42pm UTC](https://forum.mautic.org/t/how-customize-email-header-h-of-dkim-signature/12989/3 "2020-02-20T17:42:04Z")
Hi @ekke , the mautic include the “List-Unsubscribe” right? and the “List-Unsubscribe” is include in email header h= of DKIM-Signature ---
**Author:** ![volneiMR](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/volneimr/32/1752_2.png) [@volneiMR](https://forum.mautic.org/u/volneiMR)\ **Post date:** [February 20, 2020, 6:50pm UTC](https://forum.mautic.org/t/how-customize-email-header-h-of-dkim-signature/12989/4 "2020-02-20T18:50:37Z")
my server is not add header DKIM-Signature, but see what i received from email mautic: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xxxxxxx.xxx.xx; s=202002; t=1582207775; bh=B18ORY4cRHVv1Hp8DnkqweUhipBwaFgTEfuLQw6VoUs=; h=Date:Subject:From:Reply-To:To:List-Unsubscribe:From; b=Q2LvlCiHOfC3lVuFIxUA6z9tpY8mEyNgjJPkp6S6LFvhQJCqWxnjLAqBZhjR4Pu6z tHDFpvwFXgO+VYRfXw8vHZcY+zCIRyscePIZTZXyZCx8xX+YPwi2A7OPsaWzGMC5O+ wBqL8OEjYHpPMxIns4+c9PSuyzZcTHaLRO9v035HoxGL5lvF2ycHJJU9Vp27L+HcCe 7Phx0SoRZivCIHVpXQcEbWdqFEWcS9jq3Y1SIv6dWhaammf9Nl903TcSRVDA+O73yM r3/QOdY4kYIKHk3z07obfuuk+KFgE+Qjd+ClBCBbGXTL4BnxPwdH9YV0eHxz4X7+cV k0MZS7q83UpPg== is there any way to disable this header in mautic? ---
**Author:** ![volneiMR](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/volneimr/32/1752_2.png) [@volneiMR](https://forum.mautic.org/u/volneiMR)\ **Post date:** [February 21, 2020, 10:53am UTC](https://forum.mautic.org/t/how-customize-email-header-h-of-dkim-signature/12989/5 "2020-02-21T10:53:25Z")
does anyone know how to disable the dkim-signature header from mautic?! ---
**Author:** ![ekke](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/ekke/32/296_2.png) [@ekke](https://forum.mautic.org/u/ekke)\ **Post date:** [February 25, 2020, 9:42pm UTC](https://forum.mautic.org/t/how-customize-email-header-h-of-dkim-signature/12989/6 "2020-02-25T21:42:49Z")
ok, now at least I understand what you’re trying to achieve. I am pretty sure, though, that DKIM is _not_ added by Mautic (it just can’t do that - if nothing else, because there is no place to add the private key). Thus: I guess you are using sendmail delivery, right? Switch to PHP delivery and you should be fine. Otherwise, please point me to where I am mistaken - I am eager to learn! 🙂 ---
**Author:** ![volneiMR](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/volneimr/32/1752_2.png) [@volneiMR](https://forum.mautic.org/u/volneiMR)\ **Post date:** [February 26, 2020, 3:53pm UTC](https://forum.mautic.org/t/how-customize-email-header-h-of-dkim-signature/12989/7 "2020-02-26T15:53:21Z")
Hi @ekke thanks for the help, in config the mautic, i use the option “Other SMTP Server” (SwiftMailer) swiftMailer add “DKIM-Signature”. I will try the option “PHP Mail”