Read mails

How to read a mail?
How to preview attachments online?
What can I do if the attachment cannot be opened?
How to open different types of attachments?
What is "more" on the reading page?
How do I transfer mail to another folder?
Can I forward the received mail to someone else?
What should I do if the received email is garbled?
The time of the Webmail mail is different from the time in the original text of the mail?