I'm trying to use the Reply To function (which I've used successfully for years), but this morning my emails are bouncing with the message
550: restricted characters in address
The hashtag character (#) is shown as %23 in the message, as in me.catrose.655ccfc559.someone%23company.com@ob.0sg.net. I'm using my yahoo account through Apple Mail on ISP tx.skybeam.com.
Does anyone know what the problem is?
catrose