https://community.talktalk.co.uk/t5/Email/Not-sending-emails/m-p/3100798#M186519 <P>What does "550 5.7.1 Reject for policy reason" mean?</P><P>Can I alter any settings to stop this happening?</P><P>&nbsp;</P> Sat, 01 Mar 2025 11:16:30 GMT Nicky167 2025-03-01T11:16:30Z https://community.talktalk.co.uk/t5/Email/Not-sending-emails/m-p/3100798#M186519 <P>What does "550 5.7.1 Reject for policy reason" mean?</P><P>Can I alter any settings to stop this happening?</P><P>&nbsp;</P> Sat, 01 Mar 2025 11:16:30 GMT https://community.talktalk.co.uk/t5/Email/Not-sending-emails/m-p/3100798#M186519 Nicky167 2025-03-01T11:16:30Z https://community.talktalk.co.uk/t5/Email/Not-sending-emails/m-p/3101535#M186641 <P>Hi Nicky167, please reset the password on all your mailboxes to new never used before passwords. That will ensure that if someone is using your mailbox as a spam relay it will be stopped and give us a chance to improve the mail reputation.&nbsp;</P> <P>&nbsp;</P> <P>Ady</P> Wed, 05 Mar 2025 11:15:57 GMT https://community.talktalk.co.uk/t5/Email/Not-sending-emails/m-p/3101535#M186641 Ady-TalkTalk 2025-03-05T11:15:57Z