BCC visible in recieved e-mails

[berthz]

I have noticed that when using more than 5 or 6 e-mail addresses in the BCC the recipients see all the BCC e-mail addresses in the sent-from box. This should not happen. BCC should always be invisible to all recipients.

Using Roundcuibe webmail 1.2.0. Attached a screenshot of the sent mail and the recieved mail.

Sent mail:

Recieved mail:

[alecpl]

I'm unable to reproduce. Disable all plugins for test and enable smtp_debug. Then see what's really send to the SMTP server.

[berthz]

We will test this. Thanks for the reply. Please be aware that BCC is working when all the recipient e-mail addresses fit in one line. As soon as the BCC line extends to the second line the recievers see all e-mail addresses.

[alecpl]

It is possible that you're using smtp_server='' setting? I.e. you would use PHP's mail() instead of SMTP connection. In that case that would be likely PHP issue.

[berthz]

Alexander. That is correct indeed! We already figured that out, but I should have updated this issue. The server setting was using php's mail() function instead of the smtp server. After changing everything worked like a charm.