Good news, I now have two sites working with Remote Publishing. Not perfect, but pretty good and I hope simpler for those bloggers that seem to have an aversion to logging in!
Some points that may be of use to others.
Setting up a cron job:
Information for those who have not done this before; the cron job simply automates visiting the website using the URL: http://www.YOURDOMAIN/index.php?option=com_easyblog&task=cron&debug=1 (see above) This command checks the nominated email inbox (or other folder if you choose to configure differently), and the contents of any unread emails are imported into EasyBlog. Note that if you have set EasyBlog>Settings>Workflow>Remote Publishing>Publishing Options>Prefix to anything (such as [BLOG], then it will ignore any email that has been sent without this in the subject line.
Incidentally, my hosting company does not allow cron jobs to be run more frequently than hourly, so entering the above URL manually is an essential way to speed up testing.
Configuring EasyBlog
You will get the mail server information from your email provider. For some strange reason, when I tried the Run option to test the connection, it searched for ages and timed out. This was in spite of the details being correct and working correctly when I ran the import command.
Multiple Bloggers
Setting EasyBlog>Settings>Workflow>Remote Publishing>Publishing Options>'Map Email to Users Name' definitely does not conflict with the Select a User option. (EasyBlog - perhaps the documentation could be clearer on this). Blog entries are mapped to the email address they are sent from and clearly linked to that user. If you are happy for all your Blogs to fit into a single category, then it should work fine. However, if you want to have separate main menu entries for a selection of blog categories there may be a problem. All the remote publishing emails are stored in a single category, so you cannot use that to distribute the blogs between menu items. Likewise, I can find no way of allocating groups of Bloggers to a menu item. I can do individuals, but not groups.
Formatting he Email
We are experimenting with the format of emails so that the contents displays well in EasyBlog.
One of my Bloggers has had problems inserting images, and also has some strange bits of error text included in the blog. Googling for information on the latter problem suggests it is due to copying and pasting content from a Word document. However, I have not been able to reproduce it from my own emails so will need to investigate further. Likewise, I need to find out what is happening with the images as my testing does not produce the same problem.
So, well done anyone reading all the way to the end of this! Hope it might be of use to someone out there.