Initial attempt at help text for SMTP saves

[iansltx]

For #25109

Checklist for submitter

If some of the following don't apply, delete the relevant line.

• Changes file added for user-visible changes in changes/, orbit/changes/ or ee/fleetd-chrome/changes.
  See Changes files for more information.
• Added/updated automated tests
• A detailed QA plan exists on the associated ticket (if it isn't there, work with the product group's QA engineer to add it)
• Manual QA for all new/changed functionality

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.59%. Comparing base (6977ec9) to head (b7481b2).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #25446   +/-   ##
=======================================
  Coverage   63.59%   63.59%           
=======================================
  Files        1619     1619           
  Lines      154939   154939           
  Branches     4038     4038           
=======================================
  Hits        98530    98530           
  Misses      48641    48641           
  Partials     7768     7768           

Flag	Coverage Δ
frontend	53.21% <ø> (ø)

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[noahtalerman]

Thanks Ian! Nice find. Did not know that we already send a test email haha.

Like any other feature request, the plan is to bring this one through the prioritization process and drafting before we merge in your PR (make a change to the product).

We’ll weigh this request at the next feature fest.