How do I reconnect so I can email documents?

I lost that capability when I installed Mojave. I received 2 error messages. First was : please check LibreOffice settings or your email program settings. The second and current message is : lore office was unable to find a working email configuration.

I’m printing and saving changes OK. I’ve spoken with Apple twice and AOL once. My brain has been unable to get through the language of Gmail. It seems that gmail is the default email program. How do I fix that or do I attempt to change to AOL?

One dumb question (I am a rookie with all this) How do I restore grid lines to a spread sheet?

Thanks for your help. I’m frustrated but maintaining my sanity… I think.

Please see the comment from @grantler in your (almost identical) question here.

You have also tagged this question math: is this correct?

To view grid lines (I assume you mean in Calc: you didn’t say) Menu > View > View grid lines.

@wildwood531 Please, instead of asking a new question simply as a means of providing additional information, simply edit the existing question (lower right of your question. You can also add information by using add a comment.