Having sent some emails this morning I now suddenly cannot due to every attempt being rejected as Error 553 even when I remove all URLs from my signature and there are no attachments or rude words.
What is going on and how can I fix it?
Why are all my attempts to send emails being rejected by this error code? This suddenly started happening about an hour ago after problem-free emailing immediately prior to this.
Even if I remove all the URLs which have been in my signature for a long time, the emails still won't send.
How can I resolve this?
Please don't post the same message more than once.
You will see from the forum that this is a very common problem that resolves itself.
There are a couple of things you can try. If you are using a VPN, try sending without using it. Secondly, you could try getting a different IP address by disconnecting your hub from line for half an hour or so.