Error 553

[POPCORN1]

Error 553 - I am having a problem sending an email receiving Error code 553. Using BT Mail sending email with 2 attachments, am on Sky broadband. Not sure of difference between webmail and mail client. Tried clicking on webmail in link below and also shutting off Hub for 20mins as suggested in one message below, neither have helped, any suggestions? Don't want to send 24 individual emails

[NeilO]

Hi @POPCORN1 welcome to the community and thanks for posting, I'm sorry you're getting an error 553 message. Is this happening on all emails you try to send or other the one with the 2 attachments?

Thanks

Neil