I have been using the free version of AcyMailing (V7.5.12) on my WordPress sites hosted by Bluehost for the last two years. I have recently encountered email send problems on 2 of my websites starting September 1st. Each website sends emails with an attachment to around 225 subscribers, but the send process now stops after 10 emails versus before when all mails were sent. I then have to go in and resend the email campaign with the "new subscribers only" boxed checked over and over again. Any suggestions? Is this a recent limitation of the free version?