How to connect to the email service of the Computer Science Department.
| Setting | Value |
|---|---|
| Incoming (IMAP, recommended) | imap.csd.uoc.gr — SSL/TLS, port 993 |
| Incoming (POP3, not recommended) | pop3.csd.uoc.gr — SSL/TLS, port 995 |
| Outgoing (SMTP) | smtp.csd.uoc.gr — SSL/TLS, port 465 (alternatively STARTTLS, port 587) |
| Username | Your full email address (e.g. username@csd.uoc.gr) |
| Password | Your password for the Department's directory service (LDAP) |
| Authentication method | Normal password (PLAIN/LOGIN over TLS) |
Automatic setup: Most clients (Thunderbird, K-9 / Thunderbird for Android, FairEmail, KMail, Evolution and others) find the settings on their own. You only need to enter your email address and password.
Important: Connections are made only over SSL/TLS. Unencrypted connections (ports 143 and 110) are not allowed, and port 25 does not accept mail submission from clients.
Already using
mailhost.csd.uoc.gr? It keeps working for all services. You do not need to change anything. For new setups, useimap.,pop3.andsmtp.csd.uoc.gr.
Sending only from your own addresses: Through the Department's server you can only send with your
@csd.uoc.graddress, or one of your account's alternative addresses (aliases), as the sender. Messages with any other sender address (e.g.@gmail.comor another organization's address) are rejected. For those addresses, use the outgoing server of the corresponding provider (see section 8).
Username: We recommend entering your full address (
username@csd.uoc.gr). For compatibility with older setups, plain usernames are also accepted. For students these have the formcsdxxxxfor undergraduates andcsdpxxxxfor postgraduates.
Postgraduate students (MSc/PhD) with an alternative email address: Postgraduate students who have chosen an alternative email address log in with it, and it appears as the sender (From) of their messages. For example, if user
csdp9999has the alternative addressktestakis@csd.uoc.gr, thenktestakis@csd.uoc.gris the username for webmail and for email clients.
username@csd.uoc.gr| Incoming | Outgoing | |
|---|---|---|
| Protocol | IMAP | SMTP |
| Hostname | imap.csd.uoc.gr |
smtp.csd.uoc.gr |
| Port | 993 | 465 |
| Connection security | SSL/TLS | SSL/TLS |
| Authentication method | Normal password | Normal password |
| Username | username@csd.uoc.gr |
username@csd.uoc.gr |
For POP3 (not recommended, see section 6): hostname pop3.csd.uoc.gr, port 995, SSL/TLS.
username@csd.uoc.gr and your LDAP password → Sign Inimap.csd.uoc.grsmtp.csd.uoc.gr993, Use TLS/SSL ✔465, Use TLS/SSL ✔, Authentication: Passwordusername@csd.uoc.grusername@csd.uoc.gr), Password, Description → Nextimap.csd.uoc.grusername@csd.uoc.grsmtp.csd.uoc.gr, with the same user name and password (fill them in — they are not optional)993. For SMTP (Account → SMTP → Primary Server): Use SSL On, port 465.username@csd.uoc.gr → Advanced options → ✔ Let me set up my account manually → Connect| Incoming | Outgoing | |
|---|---|---|
| Server | imap.csd.uoc.gr |
smtp.csd.uoc.gr |
| Port | 993 | 465 |
| Encryption method | SSL/TLS | SSL/TLS |
If Outlook asks for a username again, enter your full email address.
imap.csd.uoc.gr 993 / smtp.csd.uoc.gr 465, SSL, username = full email address)Any client that supports IMAP/SMTP works with the same settings:
IMAP: imap.csd.uoc.gr : 993 (SSL/TLS, implicit)
POP3: pop3.csd.uoc.gr : 995 (SSL/TLS, implicit)
SMTP: smtp.csd.uoc.gr : 465 (SSL/TLS, implicit)
smtp.csd.uoc.gr : 587 (STARTTLS)
Auth: PLAIN or LOGIN, over TLS only
User: username@csd.uoc.gr
Many clients find these automatically from your email address (autoconfig or DNS SRV records), so try the automatic setup first.
POP3 is not recommended. POP3 downloads messages locally, to the device where it is set up, and usually deletes them from the server. After that they cannot be accessed from webmail or from another email client (e.g. your phone or a second computer), and if the device is lost or breaks, the messages are lost too. Use IMAP: messages stay on the server and you see the same messages, with the same folders, on all your devices and in webmail.
Besides email clients, you can read your mail in a browser at https://webmail.csd.uoc.gr, with the same login details (email address or plain username + directory service password).
Filters are managed only through webmail. Filters run on the server, so they apply to all your devices, whether or not a browser or client is open.
announcements@csd.uoc.grAnnouncements| Goal | Rule | Action |
|---|---|---|
| Sort a mailing list | To contains the list address | Move to folder |
| Handle spam | Subject contains [SPAM] |
Move to Junk |
| Automatic forwarding | All messages | Forward to address |
| Out-of-office reply | All messages | Reply with message (vacation) |
Destination folders must exist before you create the filter (Settings → Folders → +).
Filter order matters: filters run from top to bottom, and you can reorder them by dragging. If a filter contains the action Stop evaluating rules, the filters after it are ignored.
Useful for testing: with Filter disabled you keep a filter saved without running it. From the Actions menu you can also export/import or edit the code of the filter set directly.
"Wrong username or password"
Make sure you enter your full email address as the username and your directory service password, not an older password.
Messages are not sent, while incoming mail works
SMTP requires authentication. Check that you have filled in a username and password for the outgoing server, and that the port is 465 with SSL/TLS.
"Sender address rejected: not owned by user" or "553 5.7.1" when sending
The sender (From) of the message is not one of your addresses. Common causes:
smtp.gmail.com).@csd.uoc or @csd.uoc.grc instead of @csd.uoc.gr.The client suggests ports 143 / 25 / 110
Ignore the suggestions and enter 993 (or 995 for POP3) and 465 manually. Unencrypted ports are disabled.
Certificate warning
This should not appear. If it does, do not accept it and contact the administrators. Also check that the server name is spelled correctly (imap.csd.uoc.gr, pop3.csd.uoc.gr, smtp.csd.uoc.gr or mailhost.csd.uoc.gr). The old mail.csd.uoc.gr no longer exists.
Repeated failed login attempts
Repeated failures can lead to your IP address being blocked temporarily, for several hours. Fix the password on all your devices (phone, laptop, old devices that may still have the old password) before trying again.
I cannot send, although it worked before
To protect against compromised accounts, there is a sending limit per hour and per day. If the limit is exceeded repeatedly, or if there are suspicious logins from different countries at the same time, sending from the account is blocked. Reading mail continues to work normally. Contact the administrators. If you need to send to many recipients, ask for a mailing list instead of sending bulk messages from your account.
For problems not solved by the above, contact the Department's system administrators.