https://community.bt.com/t5/General-email-queries/New-error-code-553/m-p/2317586#M106904 <P>For the last two years I have regularly sent an email to a group of about 30 friends, containing a URL link to an online sheet that we all use. Since last week I have received the error code 553 message when I try to send this message. Other mails go without problem.</P><P>Have the spam checking routines on BT mail changed? Thanks.</P> Sat, 30 Sep 2023 09:02:55 GMT wrm 2023-09-30T09:02:55Z https://community.bt.com/t5/General-email-queries/New-error-code-553/m-p/2317586#M106904 <P>For the last two years I have regularly sent an email to a group of about 30 friends, containing a URL link to an online sheet that we all use. Since last week I have received the error code 553 message when I try to send this message. Other mails go without problem.</P><P>Have the spam checking routines on BT mail changed? Thanks.</P> Sat, 30 Sep 2023 09:02:55 GMT https://community.bt.com/t5/General-email-queries/New-error-code-553/m-p/2317586#M106904 wrm 2023-09-30T09:02:55Z