[Solved] Unable to Send Mail With Bad File Descriptor Error

[limtem]

I had just setup OTRS 3.2.9 on my local development machine and configure the SMTP server settings (type: SMTPS, port:26) in sysconfig. However I encountered this error: Can't connect to <our exchange server>: Bad file descriptor whenever I tried to send an admin email through our Outlook Exchange server in Admin Notification under Admin page. In fact, I was able to telnet successfully to our Outlook Exchange server successfully through ports: 25 and 26 from my local machine.

Would appreciate any advise on which area (FQDN\Sendmail setup\Exchange Server settings) I should look into in order to resolve this error.

[limtem]

I had resolved it myself.

I tried to set the module as SMTP and the ports as 26 without supplying any login credentials, finally the admin notification was able to send through the outlook exchange. Initially it was unable to send through if I had input the login credentials (AuthUser and AuthPassword) in the Framework -> Core::Sendmail configuration.

Thanks.