Deleting all e-mails

In the Apple Mail app, Control-Click on the email and select Delete.

To delete multiple emails: Shift-Click on each email until all are selected. Then Control-Click on one of the selected emails and select Delete and that are selected will be deleted.

I assume the multiple messages you refer to are email messages.
If so, you can delete multiple messages as follows:
1. For messages listed one above the other in a row, use you mouse to select the first message so that is is highlighted. Then hold down your shift key and select the last message in your continuous list of messages. All the messages from the first to the last should now be highlighted (i.e., selected). While in this mode with the messages highlighted, press the delete key on your keyboard, or alternately, use your mouse and select the delete icon at the top of the email screen (it looks like a trash can).
You can also just drag the selected emails while holding the shift key down into your system trash.
2. For multiple messages that are not in a continuous list, while holding down the option key, use your mouse to highlight each message by clicking on it. When all the messages you wish to delete are selected, as above, press the delete key on your keyboard or use you mouse to select the delete button at the top of the email screen.

These instructions are for when you are using the apple mail program. It will likely work with other mail programs.

It is very simple, beside every mail there is a check box just single click check box in order to select the particular mail you want to delete you can select all the mails you want to delete and above you can click on delete option

Two options for Deleting multiple mail messages:

1. The video below shows how to delete a single mail message. To delete multiple mail message you would do the same thing except to delete several mail messages that are in chronological order you would select the top message...press and hold shift....and scroll down to the last message you want to delete and click on that message which will highlight all messages in between the firs and last message you selected. Release the Shift Key. And Delete.

2. To delete multiple messages that aren't in chronological order click on the first message you want to delete. The press and hold the Option Key (Windows Key if you have 3rd Party Keyboard) and select each message you want to delete and it will highlight all those messages individually. After you select all messages you want to delete let go of the Option Key and click on the Delete icon in the mail menu bar.

Important:
This places the deleted emails in your Trash folder within mail. To permanently delete the messages...Right Click on the Trash Icon or hold down Control and then Click on the Trash Icon and select Erase Deleted Items from the drop down menu and they will be permanently deleted and won't take up space on your hard drive.

Want to delete more than a single email message? You can easily delete multiple email messages from the iPad by using the Mail's edit feature. The button on the top right side of the inbox is the edit button. Touching this button will put your inbox into edit mode.
Once your inbox is in edit mode, you can select multiple messages by touching each message you want to delete. You then have the option to either delete them by pressing the delete button at the bottom of the screen or moving them to a specific folder by touching the move button.

To delete multiple emails at once you can select a range by clicking on the checkbox next to the first message, hold Shift, and then select the checkbox next to the last message you want to delete.

After selecting the desired range, simply click the Delete button. The selected messages will be deleted.

Hi friend,

You want to delete multiple e-mails,press the Ctrl button in keyboard and select the e-mails through mouse (click on emails which you want to delete) ,after select the all e-mails which you want to delete press Shift+Delete and than ok,this all message permanently deleted  

Thanks,

press and hold control on the keybourd and then the select the emails you want to delete

Hold down the "caps" key (bottom left-most or right-most key) and while holding down the key use the track-ball to move down or up selecting multiple emails ... then just delete as usual.

- Cheers.