I use the new Yahoo Mail web interface with "Right" side view message and the advertisement right hand side column pops up at every new email message view.
Is yahoo so kind to make it go away permanently or they want us all to move over to gmail?

Go back to the previous format. The new one sucks!!!

The group lists I created in my email contacts are no longer accessible. Yahoo Help chat told me the feature was removed. Please bring it back! I need to edit those lists and possibly create new ones.

Allow logos to be included in signatures - as they used to be under the old system

After being TRICKED into upgrading to the new mail without a way to revert.

I have noticed: 

1. No more bulk e-mail blocking. I can get like 30+ nasty an inappropriate junk sometimes.

2. Domain blocking has been disabled, I need that as said domains that are spamming do NOT care that spammers are mass spamming others. 

3. My filters both the organization wise ones and blocks mysteriously got wiped. I can't fix the block list without the @domain block access.

Printout of email - the new version makes the actually pdf image must smaller. Prefer it to be full page size. MAKE PRINT BIGGER!!!

Bring back the capability to add a new contact directly from a received message! It is ridiculous that you have to copy the email address, exit the email message, open up your contact list, and add a new contact! Why did you ever take away this function?!? Please bring back the drop down menu for accessing contact details when simply hovering your mouse over an email address!

Stop the ads from slowing down my E-Mail response or I will be forced to change E-Mail Provider

Stop messing with the e-mail system. It is was fine and worked great. Now it's nothing but delays, changes for no apparent reason. If something isn't broken, don't try to fix. Keep it simple and easy to use.

You need better spam filters. If I receive a legitimate email with bitcoin in the subject field, this is always followed by hundreds of spam emails related to bitcoin. Same for dating, any legit online dating emails are immediately followed by hundreds of dating spam.

I also have Gmail, and that never happens in their system.

Give us a way to block spammers using there IP address since they just keep changing their email address.

Adding a filter remains inconvenient, as if designed in, like, 1993.? For example, if you want to add a filter, you might - naturally - want to create a new folder for your new filter. But did you think to do this before you went to create a filter? Most people wouldn't. Hint: WORKFLOW. As it is, you have to completely exit out of the filter thing, go back and add a folder, and then go back in and start adding a filter from scratch. There are much better ways to design this.

EVERY ADDRESS I BLOCK IS GONE 5 MINUTES LATER AND THE SAME WITH FILTERING, IT HAS NOT WORKED RIGHT FOR A COUPLE YEARS NOW! TIME TO GET RID OF YAHOO!

1) Kill the banner that appears above the email message. It pushes down the actual message and is extremely irritating.

2) The collated deal view is fine in that I can look at it if I choose to.

Any time you do something that makes it more difficult for me to access the actual mail message, drives me to consider a different mail product.

Search results only shows sub-folders locations - not the main folder & sub-folder as the Classic Mail version did. I use Yahoo for business and have main folders and sub-folders for organization and Client records. So the main folder for location along with the sub-folder is extremely important to view for the results. Please fix that!
Also, When getting results from a search when your message layout is to the right, can you bring back it viewing as full screen like Classic Mail did? It doesn"t make sense to only be able to view partial results. Thank you!

Create a user option to NOT receive what ends up in SPAM.

I wouldn't mind the ads on the right side of my email screen if they would just be still. No spinning, blinking, buzzing or whirring.