Mail for students


The CIP mail system offers comprehensive services for email communication. These include sending and receiving mail (SMTP), reading mail through different protocols (IMAP/S, POP/S), filtering mail and forwarding mail. The RBG considers mail to be one of the most important services of all and therefor does its best to ensure the robustness, security and stability of the service.

ATTENTION: Mail forwarding will be discontinued on 1.10.2018. (Announcemnet)

We use Open-Source products for all mail services because of cost, security and stability considerations.


User and passwort are the CIP account data (without @cip…!).

Which protocols can be used from where in the world can be read in the next topic. We recommend to refrain from using POP because a lot of the services (e.g. filtering) only work reasonably with IMAP.



We try to test all software and configurations comprehensively before transfering them to the production system. Only dedicated servers are used for the mail services. Every mail gets duplicated on arrival in our system. The original is sent to the live server while the duplicate gets saved on a backup server. The backup server takes over in case of a live server outage. The backup server is periodically synced with the live server to replicate changes to the IMAP directory structure.


The unencrypted variants of IMAP/POP can only be used inside the network of the institute. Outside this network the use of the TLS variants IMAP/S and POP/S is mandatory.

Own Mail-Configuration

Only computers inside the MWN (Münchner Wissenschaftsnetz) can use the SMTP Server of the institute as a direct SMTP-Gate. Otherwise you need to use SMTP-AUTH ( CIP login and password)


You can define your own filter rules. Mailfilter allows you to sort received mails into different folders or to forward or ignore them. You need to create specific rules for this. The RBG offers a webfrontend to help you create your filter rules. You can find this frontend inside CipConf together with the frontend for configuring Virus and Spam filtering.

Virus scanning takes place immediately upon receiving an email. If a potential virus is detected several Mailtags get added to the header of the email (X-Virus-rc, X-Virus-Scanned). A virus email has the following line in its mail header:

X-Amavis-Alert: INFECTED

SPAM detection is performed on the email on its way through the mail system. If a potential SPAM mail is detected several Mailtags get added to the header of the email (X-Spam-Flag, X-Spam-Status, X-Spam-Level, X-Spam-Report, X-Spam-Checker-Version). A SPAM email has the following line in its mail header:

X-Spam-Flag: YES

Please note:

Mail Clients

You can use any mail client that supports the IMAP or POP protocol. The CIP-Pool installation uses Thunderbird as the default mail client for the graphical user environment. If you want to read email in xterm or from console we recomend alpine or mutt.


Currently no quota is set for student mailboxes. We will contact the mailbox owner should we find mailboxes significantly larger than the norm.

Administration of your own mail config

You can administrate your own mail config through CipConf.

The RBG is of the oppinion that it is unlawful to block emails without consent of the recipient. Every SPAM or virus filter has occasional errors of the second kind (mails get erroneously flagged as SPAM/virus). Because of this we only tag mail as SPAM or virus and leave it to the recipient to decide what to do with the mail.