If your Amazon SES send rate is 14 emails/sec and by default, MailBluster operates at 90% of the send rate, which is 14 X 90% = 12.6 emails/sec, rounded down to 12 emails/sec. In summary, it means that MailBluster can send approximately 12 emails per second.
However, there might be other factors causing the delay:
- If you send any other email/campaign at the same time from Amazon SES, we might not be able to send emails at the above-mentioned rate.
- MailBluster sends only one campaign at a time. So, if you send multiple campaigns simultaneously, there might be some delay.
- MailBluster takes some time to prepare your campaign.
- MailBluster tries to send the campaign within one minute of your exact scheduled time. During this minute, there is a buffering time in case the sender wants to cancel the campaign.