As a result, it can use either the POP3 or IMAP protocols. Note that SMTP is the protocol for sending emails. eMail Bounce Handler never sends emails, it only fetches them. No SMTP involved here.
eMail Bounce Handler is an autonomous software. It doesn't need MaxBulk Mailer and never connects to it anyways. eMail Bounce Handler connects to a mailbox of yours via POP3 or IMAP to process the emails and extract the bounces (delivery errors).
When you send a message with MaxBulk Mailer you can set an 'Error-To' address with a specific mailbox and then process it later with eMail Bounce Handler. Or you can use your regular mailbox and set eMail Bounce Handler to remove the bounces once processed.
eMail Bounce Handler is a bounce e-mail filtering and handling tool that recognizes bounce e-mails using a customizable set of rules and extracts the recipients addresses allowing you to use them again to try sending your mail or to take them off your list.
eMail Bounce Handler simply connects to your POP or IMAP mailbox in order to retrieve bounces letting any other message untouched.