FAQ
   manual.pipni.com > Mail  |  Search  |  Problems?

Mail program gives me 503 valid RCPT command must precede DATA error. What shall I do?
It's a Outlook's problem, which appear accidentally. Unluckily there's no fix for it.
Sometimes is this problem associated with error message, which Outlook doesn't recognize, mostly about IP on blacklist. Solution.
Total count of tips: 141
Created by PIPNI
Powered by Firebird