-solved- problem to send e-mails with big copy and pasted pictures

now I got a problem during sending e-mails with big copy and pasted pictures.
With smaller pictures there are no problems. I tested it with some Microsoft Snipping Tool images.
Maybe there is a timeout?
Some informations:
Ubuntu 16.04 - 64 Bit

After pressing the “send” button, it looks like it’s working. After a few seconds the hourglas stops working without sending the message. While trying to resend or save, nothing happens. Sending and saving of this message isn’t possible anymore.

Please … check and confirm …

There is a problem uploading large attachments too. One pdf with 4 Mb fails without errors, the hourglas bar works also without finishing.

there are settings in PHP (if I remember correctly) where you can increase limits. I am not in front of the config files now therefore I can’t remember exactly but there are. I solved it some time ago.

thanks for the good point @ mcostan.
Unfortunately the problem isn’t solved after i had changed the php.ini values. from 2 MB to 500.

I got another approach, as I opened the Kopano webapp via http://kopano:8000/webapp (cause https leads through nginx internal proxy) there is no problem with attachments and picture-paste.
If you use the webmeetings, you need the nginx proxy.

Any ideas?

I am afraid I do not have access to the configuration of Kopano right now (I cannot access our system from here) but I did configure NGINX for web meetings and webapp via apache (on ubuntu) and fixed the issue of attachments… So it can be done.

Also have a look at /etc/postfix/main.cf (if you use postfix), the line that says message_size_limit

Hi klausade,
the message_size_limit of postfix isn’t the problem.
It’s changed and without nginx everything works fine.


in nginx I used the example configuration from the documentation:

proxy_buffering on;
proxy_ignore_client_abort off;
proxy_redirect off;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
proxy_next_upstream error timeout invalid_header http_502 http_503 http_504;

Solved ;)

include in the /etc/nginx/nginx.conf
client_max_body_size 50M;
systemctl restart nginx

…and it works!

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