After workingfor several weeks, i upgraded my digitalocean droplet from a 1gb ram to a 2gb or ram system. somehow this broke a few things even though nothing else actually changed, i seem to have everything else sorted except this. now n roundcube and all desktop mail applications i can no longer send mail out i get the error (435 SMTP Authentication Failure). any idea what migh tbe casuing this or how to fix it?
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