I am unable to send email from my yahoo.co.uk email address. I can however receive emails to this address.
I have logged in to the webmail and I can send emails from there, so the problem must lie with EMClient.
I can send emails from other email accounts from the EMCLient, so the problem is specific to yahoo.
miércoles 16 septiembre 2020 :: 2309hrs (UTC +01:00)
Yahoo require that all 3rd party email clients need a special key,
To generate this key go here and follow the instructions:
¡Saludos desde la soleada España!
I was already using an app password. I have just removed the account and then added it again, it’s working now. I’ve no idea why!