Postfix on Webmin can receive but can't send

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#1 Wed, 05/25/2016 - 01:58
onlineworld69

Postfix on Webmin can receive but can't send

Hello there. I am running Ubuntu 15.10 with Webmin, Virtualmin and Usermin. And I am using postfix as mail server. Somehow, I can receive emails but can’t send out somehow. I tried many ways but didn't work. Please check the attachments for more detail.

I am a newbie. Your help will be very much appreciated!

[1]: http://i.stack.imgur.com/99wr5.png
[2]: http://i.stack.imgur.com/75Vsb.png
[3]: http://i.stack.imgur.com/mxUgF.png