Client Settings

This document describes the settings you will need to use in order to send and receive using the Computer Science mail servers.

Incoming Mail (IMAP or POP)

Your pedit forwarding directs your @cs email address somewhere, which can be sunburn, xenon, csimap, csmail, or an external account on or off campus. Your incoming mail settings depend on where you send it from pedit. To find which settings you need, look up the host where you send your @cs mail via pedit in the first column. Then choose the colum to the right for the client protocol you are using, either IMAP (recommended) or POP.

If your email forwards to: Use these settings for IMAP Use these settings for POP
xenon.stanford.edu
(Students, alumni)
Server: xenon.stanford.edu
Port: 993
SSL: Yes
Server: xenon.stanford.edu
Port: 995
SSL: Yes
csimap.stanford.edu
(Faculty, staff)
Server: cs.stanford.edu
Port: 993
SSL: Yes
Server: cs.stanford.edu
Port: 995
SSL: Yes
ai.stanford.edu
(AI Lab Faculty, students)
Server: ai.stanford.edu
Port: 993
SSL: Yes
Server: ai.stanford.edu
Port: 995
SSL: Yes
theory.stanford.edu
(Theory Lab Faculty, students)
Server: theory.stanford.edu
Port: 993
SSL: Yes
Server: theory.stanford.edu
Port: 995
SSL: Yes

Outgoing Mail (SMTP)

Your outgoing mail server settings do not depend on where your @cs mail forwards. You can either use the department mail servers to send your outgoing mail, or your ISP's mail servers. Using your ISP's mail servers may be required in some circumstances, where outgoing connections to alternate mail servers are not allowed. In most cases, the alternative port 587 with TLS and authentication should work (see below).

Server: cs.stanford.edu
Normal port: 25 (enable TLS), aka "smtp" port
Thunderbird Alternative port: 587 (enable TLS), aka "submission" port
Outlook & older Netscape port: 465 (enable SSL), aka "smtps" port
Use TLS: Yes (required for authentication)
Authentication Required: Yes (required off campus)

Note: If you receive an error that looks like:

 454 TLS not available due to temporary reason', Port: 25, Secure(SSL): Yes, Server Error: 455, Error Number: 0x800CCC7F

or anything similar, it is because your Norton AntiVirus Email Scanning or other Anti-Virus software is scanning your outgoing email. Shut off the 'Scan outgoing Email' option and it should work.

iPhone / Mobile Device Settings

*Use IMAP  
Incoming server: (Use server indicated above)
Use SSL: On
Authentication: Password
Server Port: 993
Outgoing server: cs.stanford.edu
Use SSL: On
Authentication Password
Server port: 587