ContributionsMost RecentMost LikesSolutionsRe: Sending to my ntlworld email bounces with recipient's domain does not exist - [logged under F011775373] Same here - no ntlworld emails arrived since 9 o'clock last night (checked on Outlook, VM web client and various devices). Getting error sending via webclient; "(421 - 421 4.1.0 SMTP400 Cannot validate your Mailfrom Domain ntlworld.com in DNS, adjust or retry later ;id=2SYHurHTnnnnnnnnnnn;sid=2SYHnnnnnnn;mta=oxsmtp3-prd-nl1-vmo;d=20250409;t=122101[CET];ipsrc=x.x.x.x; ) "