RSL
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Recent activity by RSL-
Hi, disabling the "Introduce a delay into the SMTP transaction for unknown hosts and messages detected as spam" setting in WHM >> Exim Configuration Manager, has worked for me. Thank's cPRex
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I have the same problem too from Office 365 senders when are multiple recipients. Server at DBBP189MB1193.EURP189.PROD.OUTLOOK.COM returned '550 5.4.318 Message expired, connection reset (Suspici...