Control Web Panel

WebPanel => E-Mail => Topic started by: anandmys on August 07, 2025, 11:34:46 AM

Title: Roundcube - Connection Error - Sending a particular email
Post by: anandmys on August 07, 2025, 11:34:46 AM

A strange problem. All works well except

Few emails cant be forwarded or replied with original content

Genuine emails (ex: from Bank)

Where to check the logs to find the issue?

On clicking the send message, I get this error flashed for a second

Quote

Connection Error. (Failed to reach the server)

Title: Re: Roundcube - Connection Error - Sending a particular email
Post by: cyberspace on August 07, 2025, 12:26:48 PM

Roundcube logs:

/usr/local/cwpsrv/var/services/roundcube/logs/errors.log

Mail logs:

/var/log/maillog
/var/log/dovecot.log

If there is nothng inside Roundcube logs, check the section "LOGGING/DEBUGGING" of the file:
/usr/local/cwpsrv/var/services/roundcube/config/defaults.inc.php
and change the settings according to your requirements.

Title: Re: Roundcube - Connection Error - Sending a particular email
Post by: overseer on August 07, 2025, 01:29:31 PM

Did you check ModSecurity? Look at disabling rule 212880 or others that may be interfering with Roundcube.

Cyberspace, glad to have you back! Always hoping you are staying safe over there!

Title: Re: Roundcube - Connection Error - Sending a particular email
Post by: anandmys on August 08, 2025, 04:10:39 AM

Checking.

Looks like unable to forward any email

Title: Re: Roundcube - Connection Error - Sending a particular email
Post by: anandmys on August 08, 2025, 05:17:42 AM

I can compose and send a new email.

But I cant reply / forward any email

Not getting any clue from logs.

I tried disabling mod security / adding the exception. No use.

Title: Re: Roundcube - Connection Error - Sending a particular email
Post by: Starburst on August 08, 2025, 06:18:47 AM

Please advise the following:

What distro are you running CWP on?

Public or NAT?

Can you send out a test email form the CLI?

--

Welcome back @cyberspace

Title: Re: Roundcube - Connection Error - Sending a particular email
Post by: anandmys on August 08, 2025, 07:39:23 AM

Looks like disabling mod security for the domain , mails are going

Adding id 212880 not helping. Maybe other IDs need to be checked.

Title: Re: Roundcube - Connection Error - Sending a particular email
Post by: Starburst on August 08, 2025, 09:35:47 AM

Check the ModSecurity log file for that domain, and it should show which rule was being triggered.

Title: Re: Roundcube - Connection Error - Sending a particular email
Post by: anandmys on August 09, 2025, 07:42:04 AM

Particular domain has no logs under mod security. I tried switching on Mod security to investigate (For this domain which I had turned off)

Now I am getting errors like

"Connection to storage server failed"
"roundcube server error authenticate plain authentication failed"

Please suggest

Title: Re: Roundcube - Connection Error - Sending a particular email
Post by: overseer on August 09, 2025, 11:53:44 AM

Just look in the domains domlogs for ModSecurity lines:
/usr/local/apache/domlogs/user.error.log