On Mon, 20 Jun 2011 09:26:30 EDT, Steve Richardson said:
*definitely* concerns me. One thing they do say is that they need several IPs per block to assign to their MTAs to handle such a large amount of email (3 to 5 million per day). Being primarily focused on layers 1 through 4, I don't have an incredible amount of experience with high volume email server configuration, so I have no idea if they are feeding me a line of BS or not.
It's BS. 5M a day is only about 60 per second, not at all a problem for a single IP address running properly configured SMTP software. For comparison, in the mid-90s, I was moving 1M RCPT TO's a day (and probably half that number of envelopes) on a Listserv host using Sendmail on an IBM RS6000-220 - a whole whopping 66MZ Power 604E processor and something like 64M of RAM (The same basic firepower as an old Apple 6600 Mac, if you remember them...) Doing 10M messages a day on a single box is *easy* these days - the hardest part is getting a disk subsystem that survives all the fsync() beating most MTAs like to dish out....