# Non deliverable emails

**URL:** <https://forum.mautic.org/t/non-deliverable-emails/33274>\
**Category:** Product Support\
**Created:** [August 27, 2024, 11:20am UTC](https://forum.mautic.org/t/non-deliverable-emails/33274 "2024-08-27T11:20:16Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![martinc](https://avatars.discourse-cdn.com/v4/letter/m/779978/32.png) [@martinc](https://forum.mautic.org/u/martinc)\
**Post date:** [August 27, 2024, 11:20am UTC](https://forum.mautic.org/t/non-deliverable-emails/33274/1 "2024-08-27T11:20:16Z")

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**Your software**  
My Mautic version is:5  
My PHP version is:8.1  
My Database type and version is: Mysql 8.0

Mautic push in from header generated email address which is blocked by email provider. Is it anyway to setup static email address?

[2024-08-27T11:16:29.698360+00:00] mautic.ERROR: [MAIL ERROR] Expected response code “250” but got code “551”, with message “551 The message was rejected because an invalid sender address was used in the ‘From’ header or in the ‘MAIL FROM’ command: [https://antispam.websupport.sk/?sender=web+bounce\_66cdb58c77dd1892318596@domain.com](https://antispam.websupport.sk/?sender=web+bounce_66cdb58c77dd1892318596@domain.com)”. {“hostname”:“uk-fast-web1255.main-hosting.eu”,“pid”:775082}

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**Author:** ![joeyk](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/joeyk/32/11164_2.png) [@joeyk](https://forum.mautic.org/u/joeyk)\
**Post date:** [August 28, 2024, 4:15pm UTC](https://forum.mautic.org/t/non-deliverable-emails/33274/2 "2024-08-28T16:15:10Z")

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It means, your provider doesn’t allow that specific address as sender.  
They want to make sure you only send emails from the accounts they allow it to you.

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**Author:** ![martinc](https://avatars.discourse-cdn.com/v4/letter/m/779978/32.png) [@martinc](https://forum.mautic.org/u/martinc)\
**Post date:** [September 2, 2024, 7:32am UTC](https://forum.mautic.org/t/non-deliverable-emails/33274/3 "2024-09-02T07:32:54Z")

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So how can i force mautic to use static email address which is created in my email provider?

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**Author:** ![joeyk](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/joeyk/32/11164_2.png) [@joeyk](https://forum.mautic.org/u/joeyk)\
**Post date:** [September 2, 2024, 5:44pm UTC](https://forum.mautic.org/t/non-deliverable-emails/33274/4 "2024-09-02T17:44:05Z")

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You can set as default in your Config - Email Config page.  
And not change that.

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<div class="post-metadata">

**Author:** ![martinc](https://avatars.discourse-cdn.com/v4/letter/m/779978/32.png) [@martinc](https://forum.mautic.org/u/martinc)\
**Post date:** [September 3, 2024, 9:43am UTC](https://forum.mautic.org/t/non-deliverable-emails/33274/5 "2024-09-03T09:43:58Z")

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I have everything setuped in Email Config. But Mautic is generating this dynamic email address when Bouncing Emails are setuped.