When i try to send emails from my iPhone the error message "Unable to send email: the sender address '
rosie@comms.xyz' was rejected by the server" appears. I have tried connecting via POP and IMAP - same problem/error message. Is this connected to the fact that my emails sent from desktop are going into spam? I am trying to force Wordpress to allow a SPF key of longer than 192 chars (as when i click 'generate' in the admin panel the text is over 192 chars each time).