Thomas,
I just finished testing signature synchronization between SmarterMail and eM Client over EWS, and I did find a couple things worth mentioning.
The first thing I noticed is the table widths. It appears that eM Client defaults to using percentages for table and column widths. As a result, when viewed in the signature edit modal in SmarterMail, tables defined in eM Client will tend to appear to be narrower. To work around this, when editing a signature in eM Client, right click on any tables and select the Table > Properties menu option. In the Table Properties section, make sure Pixels is selected instead of Percent.
The other thing I noticed has to do with adjusting the border width. This is do to a difference in how borders are defined in SmarterMail and eM Client; eM Client uses the border attribute while SmarterMail uses CSS based border styles. Due to current HTML standards, the CSS based border styles override the border attribute used by eM Client. We are looking into possible changes that may make this behavior a little easier to work with.
I also tested syncing signatures from SmarterMail to EWS, but I didn't notice any issues with creating a signature in SmarterMail and syncing it to eM Client. In that case, all styles appeared to sync correctly in my tests.
Andrew Barker
Software Developer
SmarterTools Inc.
(877) 357-6278
www.smartertools.com