Question about Email library and bcc_batch_mode

[eluser]Aken[/eluser]
All bcc_batch_mode does is takes your large array of BCC addresses, checks to see if the number of addresses is higher than the bcc_batch_size, and if so, breaks up the addresses into chunks of that size and sends the appropriate number of emails.

For example, if you have 900 BCC addresses, and a batch limit of 100, it will call send 9 emails each with 100 BCC addresses.

Large number of BCC addresses is not recommended. It's far more likely to be picked up as spam, and you cannot use any personalization. I'd recommend either setting up a cron or loop to send each individually, or using a suitable email service such as Campaign Monitor, MailChimp or similar.