[TedDoesntTalk]

How do you manage the spam reputation of the IP addresses you use for mail delivery when some of your customers may be sending spam?

[gsreenivas]

We have relationships with key ESPs and email security providers to help with managing reputation/deliverability issues.

There are much cheaper ways to send spam effectively than using a Helm so we haven't seen real issues around this.

[dsr_]

The problem is not that spammers will buy your boxes and subscriptions and ISP connections in order to spam.

The problem is that spammers will get into your customers' boxes and use them to spam.