Hi Giovanni,
I recently worked on a similar issue where it was seen with Chrome. You may try the following steps as a workaround.
1. Go to ~NX_ROOT\bopcfg\www\CATALINA_BASE\webapps\CAisd\WEB-INF\web.xml and add the following XML snippet at the end of the file, in the mime-mapping area:
<mime-mapping>
<extension>eml</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
2. Restart tomcat or the entire SDM service.
Ideally, the .EML files can be opened with a mail client as well. So you can even use the same code snippet and just associate the EML with an email client, similar to how .MSG files are opened.
<mime-mapping>
<extension>eml</extension>
<mime-type>application/vnd.ms-outlook</mime-type>
</mime-mapping>
Let us know if this helps?
------------------------------
Kind Regards,
Brian
------------------------------