This article will explain step by step how to access your Zextras Carbonio CE from an email client. In this article I used Thunderbird as the email client. You can adjust with other email clients such as emclient, Microsoft outlook, etc.
1. Open Thunderbird
2. Select “File” menu. Then select “New” and choose “Existing Mail Account”.
3. Enter “Full Name”, “Email address”, and “Password”
4. Select “Configure manually” option
5. Adjust configuration like below:
– If you are using a POP SSL connection, select “POP Protocol” and use port 995.
– If you are using a IMAP SSL connection, select “IMAP Protocol” and use port 993.
6. Click “Done” after adjust configuration
7. To test sending an email from Thunderbird, click the write menu
8. Click “Get Message” to check whether there are new emails or not.
Good luck 🙂






Hi Imman,
Facing below issue, have you ever come across this issue
2025-05-14 14:33:56,930 INFO [Pop3Server-49] [[email protected];ip=192.168.212.160;oip=xx.xx.xx.xx;cid=102306;] account – Authentication successful for user: [email protected]
2025-05-14 14:33:59,537 INFO [Pop3Server-49] [[email protected];ip=192.168.212.160;oip=xx.xx.xx.xx;cid=102306;] pop – QUIT elapsed=1
2025-05-14 14:34:03,889 INFO [Pop3Server-56] [ip=192.168.212.160;oip=xx.xx.xx.xx;cid=102312;] account – Error occurred during authentication: authentication failed for [[email protected]]. Reason: LDAP error: – unable to ldap authenticate: invalid credentials.
Hi BaluMahendran,
The log information indicates that the password is invalid. Have you ensured that the account password is correct?
Hi Iman,
SMTP is working with same credentials
Hi BaluMahendran,
What if the connection is made via IMAP? Does the issue still persist? please take a look at this article as well: https://imanudin.net/2021/07/02/zimbra-tips-problem-receiving-from-email-client/