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fly · 05-22-2016, 08:48 AM

The error "550 relay not permitted" occur then email tries to sent without smtp authentication. First of all needs to check that.

Try to send email from cli or another email client, is there the same error?

05-22-2016, 08:48 AM	#10
fly ISPsystem team Join Date: Jun 2013 Posts: 233	The error "550 relay not permitted" occur then email tries to sent without smtp authentication. First of all needs to check that. Try to send email from cli or another email client, is there the same error?