https://community.bt.com/t5/Archive-Staging/problem-with-email/m-p/2168712#M1255875 <P>Binary chopping.</P> <P>Keep halving the list until you find the culprit.</P> <P>If there's 50 in the list, send to 25. If it sends the rogue is in the 25 you didn't send, if it doesn't its in that 25. Send to 12 etc etc etc</P> Fri, 25 Jun 2021 14:00:22 GMT licquorice 2021-06-25T14:00:22Z https://community.bt.com/t5/Archive-Staging/problem-with-email/m-p/2168711#M1255874 <P>I tried to send an email on a mailing list but a message popped yup telling me that one of the addresses is no longer valid. However, it didn't tell me which one, and the message couldn't be sent. How can I resolve this please?</P> Fri, 25 Jun 2021 13:55:59 GMT https://community.bt.com/t5/Archive-Staging/problem-with-email/m-p/2168711#M1255874 johnmcburnie 2021-06-25T13:55:59Z https://community.bt.com/t5/Archive-Staging/problem-with-email/m-p/2168712#M1255875 <P>Binary chopping.</P> <P>Keep halving the list until you find the culprit.</P> <P>If there's 50 in the list, send to 25. If it sends the rogue is in the 25 you didn't send, if it doesn't its in that 25. Send to 12 etc etc etc</P> Fri, 25 Jun 2021 14:00:22 GMT https://community.bt.com/t5/Archive-Staging/problem-with-email/m-p/2168712#M1255875 licquorice 2021-06-25T14:00:22Z https://community.bt.com/t5/Archive-Staging/problem-with-email/m-p/2168713#M1255876 <P>Thank you. I will try that</P> Fri, 25 Jun 2021 14:03:26 GMT https://community.bt.com/t5/Archive-Staging/problem-with-email/m-p/2168713#M1255876 johnmcburnie 2021-06-25T14:03:26Z https://community.bt.com/t5/Archive-Staging/problem-with-email/m-p/2168715#M1255877 <P>I presume you weren't trying to send more than 49, as that is the limit you can send at once.</P> Fri, 25 Jun 2021 14:08:37 GMT https://community.bt.com/t5/Archive-Staging/problem-with-email/m-p/2168715#M1255877 licquorice 2021-06-25T14:08:37Z