退信

• 退信提示："unavailable mail user"
• 退信提示："Mailbox not found"
• 退信提示："invalid user"
• 退信提示："restricted"
• 退信提示："user disabled"
• 退信提示："user not known"
• 退信提示："local server don't exists that user"
• 退信提示："mailbox currently unavailable"
• 退信提示："Bad recipient address syntax"
• 退信提示："The email account that you tried to reach"
• 退信提示："recipient does not have an account"
• 退信提示："This account has been temporarily suspended"
• 退信提示："This user doesn't have a yahoo.com account"
• 退信提示："not user of this server"
• 退信提示："Bad address syntax"