stanbusk said:MaxBulk works like any other application. It use port 25 for sending email using the SMTP protocol. What do you mean with 'blocking'?
stanbusk said:Are you running an anti-virus? Is it checking all outgoing messages? In such case you would better deactivate it while you are sending your message.
stanbusk said:I have never heard of such problem and I have no explanation for such phenomenon.