Hello Milan,
Thank you very much for your help. Removing module-tnef-attachment.so from
/usr/lib/evolution/modules solves the problem. I have tried this with both
3.16.0 running under 15.04 and 3.16.3 running under 15.210 Gnome. I also
contacted the employee of vendor sending me the e-mails.
My Evolution was freezing, requiring a restart. I upgraded from Debian
Jessie to Debian Stretch. It was worthwhile: the Evolution v 3.16.3
included in Debian Stretch works well for IMAP Mail, Contacts
(OwnCloud) and Calendar (OwnCloud and iCloud). :-)
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