HTML in Apple Mail

What happens when you email the properly displaying email on YOUR Mac BACK to her?

This is curious, no doubt. It would be interesting if ALL HTML emails to her displayed funky - but if it is just this one, that indicates something with that particular email in conjunction with some attribute setting?

If this is isolated to that one email, this MAY not be worth pursuing except as an academic exercise (?)

I missed the "change" part... there is 99.99% chance that the "change" two weeks ago is the culprit - that is IF ALL HTML emails display this way.

What was the change? That is the $64K question. Did ya'll upgrade El Cap at that time? Something else? Accidentally make a settings change? (seems hard not to remember tootling around in the settings dialog)

Check here:

Howdy Lanny

I think the OP states "received an HTML(RTF) email" that display s wrong on one Mac and not the other - I am assuming this is from some 3rd party

Soooooo... not 'composing' at all

In reading about " read HTML email messages as Plain Text " - I saw something about needing to use Terminal to make a global setting for that. Seems UN-doable by accident.

If the latter is true, this is a MAJOR step for many folk that are leery of HTML emails (not really all that unfounded a fear at one time) - I use Thunderbird and Outlook Express on different machines... Thunderbird barks at me about every "new" sender and asks if I wanna display images, etc. - OE is somewhat less robust in its paranoia, but I can certainly easily choose to read only plain text.

Mysterious

Check on this View preference:

Is that pref setting ticked the Default? (I can see that one getting UNticked accidentally on purpose pretty easily, I guess)

Haven't some folks reported pref settings getting changed by simply updating El Cap?

OK.

Let's say El Cap 'upgrade' is not the issue, as you say the time frame does not fit... what about an 'update' from a 'version' of El Cap (this can happen as an 'automatic' task, if that is the preferred setting)

Another possibility is that the sender made some change in their crafting of the email newsletter '2 weeks ago', but that is 'maybe' discounted by the fact that running it through your Mac with forwarding 'cleans it up'

Try starting her Mac up in Safe Mode - test your 'her Mac only' actions = joy?

If joy (or not), restart in normal mode and test again (Safe Mode does stuff behind the curtain that carries over to the normal restart) = joy?

Usually, we would also recommend setting up a new user with admin privileges, but I am unsure whether Apple Mail would like a new user running her mail accounts (I cannot test - but that may be worth trying)

A pity that ya'll have to wait a week between original emails

Is it possible she hit the twanger in leroydouglas's screenshot? Easy enough to do.

One way to test that is to have her look at some other emails that have linked content... Apple does it, Amazon does it, my Quote of the Day guy does it

That would tell you if it is just that sender or all linked content

Screenshots with personal identifying info redacted might be nice so we don't have to paint a mental picture - her way and your way - Preview App will do the redacting and annotating job

Ooops... two ships passing in the night about the checkbox

Gil Woolley wrote:

I have asked the source of the email newsletters to send a copy to me at the same time they are sent to my wife so that i can see how it appears on my computer and compare it with hers.

I'm going to go try to restart her computer in "safe mode" and see if that corrects the problem.

I am accessing these discussions on my own computer so she could not have hit the twanger in leroydouglas's screenshot. I'm not quite sure what you mean by a twanger. This technical talk makes me go all limp;-)

Excellent plan

Let us know.

"twanger" in this case is the "checkbox" on the Settings prefs panel NOT in leroy's screenshot (for your convenience) 😉

EDITadded

Didn't you say you inspected this pref on both your wife's and you own Macs?