[MlMt] Inline CSS Error

Simon Kaplan simon at kaplan.id.au
Fri Aug 19 20:24:09 EDT 2022

Hi Benny and Henry

Yes that was the problem - I rebuilt my signature so there was no 
stylesheet, and now it’s good.

Thanks for sorting this for me.

Moral of the story:  Don’t use word to create HTML signatures!


On 19 Aug 2022, at 18:08, Benny Kjær Nielsen wrote:

> On 19 Aug 2022, at 1:42, Simon Kaplan wrote:
>> In the last few versions of MM I’ve been getting the following 
>> error as I compose:
>> Warning: CSS inlining unexpectedly failed
>> A JavaScript exception occurred
>> And I get a bright orange header bar as I’m composing that says
>> External command failed:  sanitize-html
>> Any ideas, anyone?
> The change in MailMate causing this is that MailMate now inlines CSS 
> in your HTML signature before embedding it in the HTML of the message 
> itself. This is actually MailMate trying to help you because a 
> signature should not contain a stylesheet. (I've yet to see an example 
> where someone did this on purpose. It's usually the result of using an 
> entire HTML document as a signature.)
> That said, there might still be a MailMate bug/issue since the 
> inlining failed. You are welcome to send me your signature (off list) 
> and I'll see if I can reproduce it. If I can then I'll look into 
> possible workarounds or a more graceful way of failing.
> -- 
> Benny
> https://freron.com/become_a_mailmate_patron/
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