Seahub not sending emails

Hi,
I just installed seafile/seahub and wanted to test the forgot password function on the seahub web panel.
Unfortunately it does not send any mail, seahub connects to mail server but that was it, no mail passed etc.

mailserver log:
Jun 5 12:09:32 mail postfix/postscreen[15215]: CONNECT from [10.0.0.101]:39774 to [10.0.0.109]:25
Jun 5 12:09:38 mail postfix/postscreen[15215]: PASS NEW [10.0.0.101]:39774
Jun 5 12:09:38 mail postfix/smtpd[15218]: connect from unknown[10.0.0.101]
Jun 5 12:09:38 mail postfix/smtpd[15218]: lost connection after EHLO from unknown[10.0.0.101]
Jun 5 12:09:38 mail postfix/smtpd[15218]: disconnect from unknown[10.0.0.101]

My seahub settings file says logs are saved in /tmp but there are only .djcache files

I use ubuntu 16.04.2 LTS

you had to configure your mailserver (postfix) to handle the connections from seafile.
this is not part of seafile.