POPmonitor - 2.1.3

I registered POPmonitor years ago, and I'm also very concerned that the developer has abandoned it. I'm afraid it's only a matter of time before it will no longer be compatible with future versions of OS X.

What concerns me the most is that the developer is keeping his website updated with copyright info dated 2007 and claims that it's compatible with Intel Macs, but the latest version of POPmonitor, 2.1.3, was released in 2003. That's 4 years already!

While POPmonitor does run on Intel Macs, it only does so only by using Rosetta. The developer's website, including his FAQ page, has no reference of whether he will upgrade POPmonitor to be natively compatible with Intel Macs which further leads me to believe he has no intentions of doing so.

I love POPmonitor, but I need to find a replacement for it. Does anyone know of an application that does the same basic thing and has an active developer?

There's no option to specify a different SMTP port. Otherwise, the program worked fine, but I didn't buy it due to the SMTP port limitation.

I am disappointed that this developer appears to not want to update this program anymore. I think that for $25, the developer should stay on top of this product better.

It seems that you really have no idea what you're talking about. If you want a bayesian spam filter for $25, you can buy Spam Sieve, which is a great program. I use it every day, and it is 97.7% accurate on my system.
I also use POPmonitor every day. It allows me to see my incoming email before opening my email program(s). It flags my Spam. It could delete my Spam, but I chose to report it to different people, including SpamCop, so I no longer delete it automatically with POPmonitor.
The point of a blocked senders list is that some spammers will use the SAME address to send their email, at least a couple of times. That's the exception rather than the rule though. By the way, I no longer block spammers, and when I get repeat email from them I simply report them again.
But POPmonitor has more options than blocking senders. As I mentioned, I don't block senders, but guess what? I do use roughly 350 filters that identify spam, and once POPmonitor tells me I have email, I decide what to do with my email, and which email program to open. When I get spam I mostly use Mail, and report it to SpamCop with SpamCop 1.3.2. When I get "good" mail, I use other programs.
Before offering such a low rating, or any rating for that matter, you may want to give it a little more thought.
On the negative side, the filter updating could be simpler and/or automatic.

I first used POPmonitor in trial form because I thought it was quite expensive to buy. It got daily use and worked well so recently I paid up for the full version to get the benefit of full filtering, multiple accounts and so on. I am glad I did!

I was on the point of shutting one of my e-mail accounts due to the high spamming it receives but I still have it thanks to POPmonitor keeping it purged!

Also, I had a problem due to MY e-mail provider and the developer provided me with a patched version of the app to address this in a matter of hours! Amazing service!

So, in summary - a powerful app with excellent support. Top marks all round!