[MlMt] For business

[Tom]

Hi Benny,

Long-time MailMate user here. I'd like to request a feature: the ability 
to trigger macOS spell check (and ideally system grammar checking) 
automatically when clicking Send.

This is becoming a blocker for me using MailMate commercially. I have a 
LanguageTool subscription that works seamlessly in Apple Mail and 
Thunderbird via the system text view integration, catching grammar 
errors that spell check misses. MailMate's custom text rendering appears 
to break compatibility with these system-wide grammar tools.

Apple Mail has spell check before send built in (Preferences → Composing 
→ Check Spelling: When I click Send), and Thunderbird offers similar 
functionality.

I looked through the hidden preferences and custom message verifications 
documentation but couldn't find a way to achieve this. The delayed 
sending workaround helps catch errors after the fact, but a proper 
pre-send check would be cleaner and more reliable.

Would either of these be feasible:

 1. A hidden preference to trigger spell/grammar check before sending
 2. Compatibility with system-level grammar checkers like LanguageTool

MailMate's Markdown composing and correspondence view are genuinely 
excellent - I'd prefer not to switch clients, but I don’t want to keep 
sending emails with avoidable errors.

Thanks for your work

Tom

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