Well, found somewhat of an answer here:
http://www.hmailserver.com/forum/viewto ... 260#p81260

Each undelivered message appears on a new line.

Hi, I've had a look at the documentation for the COM API, and it does somewhat it's job. i.e. you know if you query a long value, you'll get a long. What's missing is the string reply for undelivered messages. I can't simulate an undelivered message easy enough (i.e. it'll probably bounce unless a t...

Of course:
On connect, 5XX - Your temporary blacklisted due to possible spam activity. Disconnect.

The pattern for greylisting from my point appears: 1. They try multiple times to send the message. 2. They use different 'From' email addresses. 3. They are trying to send to the same recipient. I'm thinking we can put this sort of activity on hold or make it less effective for spammers by implement...

Anyone else interested in bandwidth logging?

It could simply be logging the data size of each message in or out from a user, and maintaining that for each email address?

That's more of a data consistency issue, something for a system adminstrator to maintain.

Probably easy to implement a feature like that though, have a question ask if they want to delete them from other lists should they be found there.

Yep, my vote on this one. Good idea to automatically whitelist those that are already known!

It'd be good to see a feature to block spammers by IP. I've requested a similar feature before. So, basically when it is noticed that a large spam emails are coming from a singular IP range, it can simply be IP blocked. If they want to get unblocked, they can then use a free email address to contact...

I'm interested in this web mail idea. I like it kept clean, and agree, there's no need for a contacts feature. It only bloats things and makes more needless bug fixes for developers, etc. when things break (and adds to any security issues possible). As for project maintenance, you might get more mai...

Logging bandwidth usage for each email account for SMTP and POP3 access. I think this would be handy so that it can be seen what bandwidth is attributed to email account usage. And it could have an 'other' view, so that emails that aren't delivered (or brute forcing, etc) can be placed in a seperate...

I like this idea, I have a feature request for similar functionality. I like the thinking of using the outside script to do it, however, I see a flaw in that if the data was maintained inside hMail, it could be as simple as an array search of addresses (similar to PHPs inarray). Many of the addresse...

Hopefully the title is good. What I have in mind is taking the greylisting database, and any IP that has predominantly been greylisted, should not be allowed to open connections. This would basically be a method of ignoring connection requests from particular IPs so they can't connect. The feature w...