Check Mail

How to check mail?
Why can I receive the email whose "To" field is not my address?
Why can't I receive the email from other sites?
Why can't sender receive a reject letter when the recipient does not get the email from the sender?
Does my email system delete the email in the mailbox automatically?
Why can not I receive emails from my friends?
For the limit of mailbox space,how should I do to free some space and retain original emails at the same time?
How to delete the emails I don't need?
SMTP/POP3 set up correctly. Why can't I send and receive emails?
How to reject emails?
What advantages of POP mails is? How to make the settings?
How to rank the emails?
What do the email status marks mean?
How to mark the status of the emails?
Can servers clear the "Delete" folder automatically?
Why can't I find out a new email when the inbox prompt messages?
How to create a new folder?
How to change or delete folders I created?
How to tag mails with more types?
How to reply messages with attachments?