Hi, I'm having a problem, with receiving emails. Any help would be appreciated I've recently installed ISPConfig, using this link: https://www.howtoforge.com/tutorial/ispconfig-automated-install-script/ The only thing, that seems to be broken is receiving emails. Every time, I reply to sent e-mail (from eg. google) I got error: Diagnostic-Code: smtp; 550 5.1.1 User not found Last-Attempt-Date: Fri, 10 Feb 2017 15:48:57 -0800 (PST) I've followed this steps: 1. Setup the domain 2. Setup user mailbox Squirrellmail and external e-mail clients works fine. Also, sending email from user@domain to user@domain works fine. The only trouble is while replying to email sent from user@domain to user@google. While replying, I'm getting Diagnostic-Code: smtp; 550 5.1.1 User not found Last-Attempt-Date: Fri, 10 Feb 2017 15:48:57 -0800 (PST) Could you give me a hint what to do next?
