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21Cn E-mail Settings for iPhone

Outgoing Mail Server Configuration

Server Hostname	The hostname given by your service provider (usually smtp.21cn or mail.21cn)
Server Port	Usually 25 or 587
Username	Your full e-mail address
Authentication	Password
SSL/TLS	Try Both

Incoming (POP) Mail Server Configuration

Server Hostname	The hostname given by your service provider (usually pop.21cn or mail.21cn)
Server Port	110
Username	Your full e-mail address
Authentication	Password
SSL/TLS	Try Both

Incoming (IMAP) Mail Server Configuration

Server Hostname	The hostname given by your service provider (usually imap.21cn or mail.21cn)
Server Port	993
Username	Your full e-mail address
Authentication	Password
SSL/TLS	Try Both