invalid username/passworb

i recently installed em client on my win7 laptop. it appears to be sending & receiving mail, but i’m constantly getting the “server says invalid username/password” window. should i just continue on as is & ignore this message? yahoo mail is my server.

Please see this topic first: https://discourse.emclient.com/emclient/to…
It is known problem on Yahoo server and I cannot provide you any solution at the moment.