EmClient 6.0.2 stopped working 48 hours ago … on all of our company’s 10 PC’s. The program launches normally, no new mails can be sent /recieved.
Server settings are unchanged, Virus program / firewall on or off, no matter … WHAT?
i created a brand new e-mail account, webmail shows that it is working, emClient doesn’t download mails.
Latest Windows update not supporting version 6.0 ?
Wow! That version was replaced so many years ago! I am sure you must have your reasons for still using it. 
Did you try uninstall and then download and install the version again from the Release History?
it’s been working perfectly so far … strange that it stoppped working on ALL computers at the same time 2 days ago. I’ll try to install a more recent version 
Wow amazing V6.x is still being used Ps Probably the authentication methods used in the EMC v6.x are no longer supported on that particular mail server. So needs the later client versions.