Mjml: Thunderbird removes columns

[m-kaddatz]

Describe the bug:
Thunderbird removes columns since the newest update. (78.4)

To Reproduce
Just create a template with columns and send it to a Thunderbird client.

MJML environment

OS: [Windows]
MJML Version [4.2.0]
MJML tool used [VSC Extension / 1.6.0]
send via Litmus / Mailchimp

[iRyusa]

Well, thunderbird adds a new "security" feature that strip media queries, as for now you can disable it locally but there's nothing we can do to prevent that behavior.
https://bugzilla.mozilla.org/show_bug.cgi?id=1530106

I know that's not the reply you're hoping for, but you should fill a ticket on thunderbird side so they maybe looks a bit closer at this.

[m-kaddatz]

Thanks for respond. So, is there a reason why the desktop-width is defined in the media-query instead of inline? I looked into the Mailchimp-code and they are doing it in another way (including the mobile-width in the media-query).

[ngarnier]

@m-kaddatz MJML is mobile-first as it's the best approach to ensure responsive support across the widest range of email clients. This article is quite outdated but the description about responsiveness in "The Approach" section still stands, if you're curious: https://www.smashingmagazine.com/2017/01/making-responsive-html-email-coding-easy-with-mjml/

[ngarnier]

I'm reopening as even if it's not a bug related to MJML but Thunderbird, it's good to track.

Though I don't really like the idea of adding this to MJML and rather hope Thunderbird will fix this, @M-J-Robbins shared a potential workaround on Twitter: https://twitter.com/M_J_Robbins/status/1334091297435639808.

[Pharmasolin]

There are few examples how thunderbird can be targeted https://howtotarget.email/ may be it worth replace owa feature with fix for thunderbird in mjml v5 if thunderbird wouldn't revert their change?

[iRyusa]

This has been released I think !