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The new file and mail server is cech05. Mails can be accessed as usual using IMAP (TLS/SSL),
POP3/POP3s or via SSH-login and the standard unix tools (pine, mutt, mail).
Plain IMAP (i.e., without encryption) is not supported anymore. In addition to the options above there
is a webmail interface (using IMAP as its backend) that is accessible world wide and that allows for
sending mail from remote.
POP3(discouraged; use IMAP instead).
For accessing mail via POP3 the only settings to be changed are the hostnames of the incoming and outgoing mail servers (replace cech04 with cech05). Usernames and passwords remained unchanged. Parallel access from different mail profiles to both machines (cech04 and cech05) simultaneously is strongly discouraged; there is only one NFS-shared file system (physically held at cech05), so inconsistencies (loss of mails in the worst case, that is) cannot be excluded.
Configuration dialog of mail reader (POP3/POP3s):
** You must specify "No" here, CRAM-MD5-Authentification is unsupported. Ironically, it would be less secure than password authentication via an encrypted channel, anyway.
Note: Access from outside the institue should always use encrypted communication; for internal access this is not necessary (performance).
The same as above generally also holds for IMAP access, the main difference being that unencrypted IMAP connections are not longer supported (server limitation). In general there are two possible ways to negotiate an encrypted connection, one is via IMAP-TLS (sometimes also referred to as STARTTLS, preferred option) and the second one is IMAP-SSL. So there are two options to choose from that just differ in their destination port and connection protocol. Most modern mail readers (PMail aka Pegasus Mail, Thunderbird, Mozilla, Opera, ...) will correctly handle both options without a problem, only Outlook (and Outlook Express) are violating the standards (as usual) and cannot correctly handle option 1 (IMAP-TLS), so there's only option 2 (IMAP-SSL) available. You may also consider changing your mail reader, what would be a benefit anyway and is strongly recommended, since the inseparable "duo infernale" Outlook Express + Internet Explorer was (and still is) the major intrusion channel for malware of any kind.
Configuration dialog of mail reader (IMAP/IMAPs):
** cf. footnote two above
The webmail interface can be accessed world wide at https://cech05.chm.tu-dresden.de/.
In case you specify http:// there will be an automated redirection to https, so the connection will always
There will also be a link from our insitute web pages.
Accessing your home directory as a network share using samba is trivially easy.
In Windows explorer, choose "Extras -> Connect network share", enter
\\cech05\username as the destination path on the server (sometimes also
referred to as folder) and supply your credentials when asked to authenticate yourself.
Quota and warning mailsUser's HOME directories and mail INBOXes reside on physically different file systems with different storage capacities. For several reasons these file systems have quotas enabled, i.e. users can use only a limited amount of storage space. The limits are usually 512MB-1GB for mail INBOXes and more than 5GB for user's HOME directories.
The system is performing quota checks once per day, and will issue a warning email (Subject: Over quota...) in case the soft limits were exceeded. Take these mails seriously, as after a certain grace period (usually 7 days) you won't be able to receive any mails at all (actually, the mails will be rejected!).
Remedy: Besides the obvious clean-up of your mail INBOX (delete mails, that is) there is also the possiblity to move mails to a different IMAP mail folder. These folders reside on the HOME file system with significantly larger storage capacity than INBOX. To create such an additional mail folder, you usually have to richt-click on the mail account (Thunderbird & Co) and select "Create (sub-)folder". These newly created IMAP folders will automatically be subscribed to.
Important: In both cases (delete and move mails) you'll have to "compact" the INBOX folder afterwards, otherwise mails will only be tagged, not removed from INBOX. In order to do so just richt-click on INBOX, then choose "Compact this folder" (or similar) from the popup context menu. Done.
|Webmaster Impressum last update 01-31-2014 by K. Vietze|