For emails sent via Office 365, reply-to header could contains additional spaces or get multiline header. e.g.: In-Reply-To: <4ba8f246904b4fedb49fbab7945a7f82@AM3PR06MB433.eurprd06.prod.outl$$k.com> The message lookup fails if header is not stripped
For emails sent via Office 365, reply-to header could contains additional spaces or get multiline header. e.g.: In-Reply-To: <4ba8f246904b4fedb49fbab7945a7f82@AM3PR06MB433.eurprd06.prod.outl$$k.com> The message lookup fails if header is not stripped