Please people... I understand your frustration but please consider not being so harsh on Zimbra about this.
If you force their hand, they may just decide not to offer ZD for free anymore. That would ruin it for a lot of us.
It’s free... you are not required to use it. If you are not satisfied with any aspect of ZD, please consider simply not using it. But please don't ruin it for the rest of us.
The assumption is that Zimbra is putting as many resources as they can into it consistent with it being FREE. Some of us are quite grateful for that and are willing to accept things we might not if we had to pay for it. It’s only fair.
So again, I urge you not to ruin it for everyone else and force Zimbra’s hand by being so demanding that they decide to withdraw the product or start charging for it. You have complete freedom not to use it if you so choose. Maybe you can try it again at a future date and it will be more to your liking.
If you badger and complain, you will be doing a disservice to those of us who rely on ZD remaining available and free.
As far as yahoo goes, they have always charged a premium for POP access. Google gives free POP. A long time ago I could see a reason to prefer yahoo over Google mail, but I no longer do. It's not that I am crazy about Google, I'm not. They are TERRIBLE about your privacy and do all kinds of evil things with your personal information. But I am sure yahoo is no better, so overall, I would advise switching to Google mail. BTW... Google mail is working fine in the current version of ZD.