# E-Mail Themes - CSS

**URL:** <https://forum.mautic.org/t/e-mail-themes-css/5568>\
**Category:** Product Support\
**Created:** [January 15, 2016, 4:35am UTC](https://forum.mautic.org/t/e-mail-themes-css/5568 "2016-01-15T04:35:58Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![cremigerhonig](https://avatars.discourse-cdn.com/v4/letter/c/9de053/32.png) [@cremigerhonig](https://forum.mautic.org/u/cremigerhonig)\
**Post date:** [July 5, 2024, 10:14am UTC](https://forum.mautic.org/t/e-mail-themes-css/5568/12 "2024-07-05T10:14:51Z")

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I also have problems with themes CSS

is it related to this issue?

# [Not sending emails - adding various CSS to mails - sending email create 503 error](https://forum.mautic.org/t/not-sending-emails-adding-various-css-to-mails-sending-email-create-503-error/32651)

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