As of today...Yahoo has cut their server to zimbra desktop...no sync at all.

you can always copy 1.8 directory to replace java inside zimbra...I had done that before

can't wait..thx..

No..did not cure itself...I used ff to send...bad me.

yahoo mail cured itself...it was yahoo issue.

I suspect (guess) the imap server number hard coded by Zimbra is outdated..

thx...

judging the Zimbra is not talking to Yahoo....I need to find another desktop client too...I don't like outlook myself..but if it got supports then I might give it a try.

Same problem this week..yahoo help centre, tried to help but same problem...hope zimbra release new version in couple of weeks fixing this "human verifications"..

what is in zimbra sync has ticked off the yahoo server to get this error code..

I'm on ff35.0.01 zimbra 7.2.5ga..no issue using ff as default..

goto your window program to set ff as your default browser..

I deleted my yahoo account and used imap to resetup yahoo account...but imap has no calendar and address.but I can send email without human verification needed.

so I went back...delete imap account and resetup with Yahoo selection...noop...the dragful human verification is back