OBS is having problem in sending email via the SMTP server. Please try the followings:
Check if the SMTP service is running by using the command below:
“telnet x.x.x.x 25”
Trigger a forgot-password email via [OBS Management Console]->[User Login]->[Forgotten your password?] and see if any email get sent out
Ping the hostname of the OBS machine to see if it can be resolved into an IP address, i.e. 'ping obs_hostname'. If not, then check if the host file contains a proper entry for your hostname
In your SMTP server configuration, do you have email relay disabled for the OBS machine? If so then it will need to be enabled in order for OBS to relay emails
Try pointing to another SMTP server.
If you are on Linux, please try setting the LD_ASSUME_KERNEL environment variable in $OBS_HOME/bin/startup.sh by adding the following line and restart the OBS service:
export LD_ASSUME_KERNEL=2.4.19