<iCloud_password> (the one you have created here for MaxBulk Mailer)
A custom app specific password may be required for MobileMe/iCloud accounts. If your password is not accepted just turn off the two-factor authentication option here or better create a password for MaxBulk Mailer from the same page by clicking on 'Generate Password' (in Security, below APP-SPECIFIC PASSWORDS). A pop-up box will open, just enter MaxBulk Mailer (or any name you choose). Apple will then generate a secure password. Copy this password into the Settings > Password box in MaxBulk Mailer.
Note that MobileMe has several delivery limits: 1000 messages can be sent each day to a total of 1000 recipients with up to 500 recipients per message in bulk mode. More information here.
As a precautionary measure to stop spam, many ISPs are no longer allowing outbound traffic on port 25. As a result, your ISP may have blocked port 25 on your account. Port 25 is the standard TCP port used to send e-mail via the SMTP protocol. Hopefully most SMTP servers offer their services through several ports. So, if MaxBulk Mailer can't connect to your server through default port 25 try to use port 587 or 2525. If the 'LOGIN' authentication scheme gives problems try 'PLAIN' from the second pull-down menu next to 'Authentication'.
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