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Ask Slashdot: How Effective Is Your ISP's Spam Filter?

An anonymous reader writes with the question in the title: does your ISP do a decent job culling spam? The reason I'm asking is that my ISP is Verizon and the Verizon spam filter is next to useless. It only blocks 15% of spam while also blocking 5% of legitimate emails. I've tried calling Verizon support a couple of times and the experience is about as pleasant and productive as banging my head on a wall. At this point I think my best move is to change ISP, but before I go around changing my email address at probably dozens of web sites I'd like to be sure that a new ISP would actually be better.

8 of 269 comments (clear)

  1. Rule #1 by Diss+Champ · · Score: 2, Informative

    Don't tie your email account to your ISP. Decide how you are going to get your email independently, then your ISP is just the pipe.

    Two benefits:
    - You can change your pipe without causing problems- your email address doesn't change
    - You have a lot more options for email providers than most people have options for ISPs.

  2. Google by Kernel+Kurtz · · Score: 3, Informative

    I use both Gmail and Google Apps for my own domain email and their spam filtering is very good.

    1. Re: Google by lurker412 · · Score: 3, Informative

      Well, maybe. What I know is that I don't see much spam even in my spam folder, which does suggest that Gmail may be blowing a lot of stuff away before I have any chance to see it. OTOH, I don't ever recall a case of learning later that something legitimate had been deleted instead of put into my spam folder, and the number of false positives there is tiny. My overall impression is that their filtering system is very effective. I haven't seen a true spam message in my inbox for years and don't even think of it as a problem anymore.

  3. Re:Why use ISP email? by CastrTroy · · Score: 4, Informative

    THIS

    There's no reason to use the email provided to you by your ISP. It's just another way to keep you locked into their services. Once upon a time, before web mail, and easily available domain names and hosting services, it made more sense to just use whatever your ISP gave you. But there is absolutely no reason to use it now, and it can actually cause a lot of problems as the OP has pointed out. Personally, I wouldn't recommend using a 3rd party Email provider at all. I would just buy my own domain name and figure out my own hosting solution for the email. Even if you just forward the email to GMail (This is what I do), you own the email address, and you don't have to worry about what happens when you want to switch the interfrace, and end up having to change your email address in the process. Many sites use your email address as your login, assuming that nobody would ever want to change their email address. Sure, GMail may be nice now, but they've shut down services in the path. I ended up switching email addresses a couple times when email services decided to close up, or just start offering really bad service. I don't ever want to have to switch email addresses again.

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    Anthropic principle: We see the universe the way it is because if it were different we would not be here to see it.
  4. Spamassassin and Greylisting.. by popoutman · · Score: 3, Informative
    Up to date spamassassin and well configured greylisting works very well for my email solution. The most spam mail comes in on mailing lists that deliberately have differing settings on them. Plus I have spam and ham training active. Rare enough to get spam into my actual inbox these days.

    I've also got very little spam on my Gmail address as well..

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    - This sig deliberately left blank. Nothing to see, move along.
  5. No filter is perfect but many are very effective by sjbe · · Score: 5, Informative

    You can set up a filter that removes (what you consider to be) an acceptable TP:FP ratio, but it won't be effective for long. The Spammers are constantly adjusting their tactics to get around filters. Eventually the noise will take over and you will either lose an unacceptable amount of non-spam email or you will receive an unacceptable amount of spam email.

    Disagree. I have used gmail for quite a while and I very rarely see spam outside of the spam folder. This has been the case for many years now. I honestly cannot remember the last time I had a false positive (non-spam sent to the spam folder) and false negatives (spam that gets to my inbox) are fairly rare - less than 10 a month usually. It's good enough I don't even bother to check my spam folder anymore. When one does slip through I just flag it and the problem goes away. Spam effectively almost doesn't exist for me. While I do agree that no filter is perfect it isn't that hard to have one that is highly effective. With enough people flagging spam filters can be very useful in automating spam removal. It doesn't entirely solve the problem but it has made it manageable.

    You cannot win with filters, period.

    I have no illusions that I am going to eliminate spam entirely. The ISPs are the only ones really in a position to do something about the problem. So far nobody has come up with a credible and effective solution and I don't see that changing anytime soon.

  6. Very Effective - but it's not my ISP by pubwvj · · Score: 1, Informative

    My spam filters are very effective, but they're not on my ISP's servers. My email comes in through my own custom domain name sitting on an 'Nix Apache CPanel shared web host that I rent space on. I get to setup. This is very effective. Then my MacOSX Mail App does the next level of filtering. I have each level set for whitelists, blacklists, keywords so that there is very little in the way of false positives and only about 0.1% to 0.001% of spam is getting through (I have stats). There are surges where it rises to the 0.1% level when the spammers try something new but then the system adapts, recognizes them and zaps them.

    Verizon is probably not a good choice for a spam filter as they do not have a lot of incentive to care.

  7. Re:Why use ISP email? by David_Hart · · Score: 4, Informative

    I don't think the OP is suggesting gmail is going anywhere soon. I think he is suggesting that they may not be round in the (not soon) future.

    There was a time when AOL wasn't going anywhere anytime soon. Maybe they still aren't, but that claim is straining credulity. At the very least, being stuck with an AOL email address in 2015 is not an ideal situation to be in. Is it really so hard to imagine that one might not want to be stuck with a gmail email address in 2035?

    I pay for my own domain and external hosting. It has Spam Assassin on it and gets about 40% of the spam. I have GMail configured to pull in my email from that account. GMail's spam filter gets the other 59% of spam. I set up Gmail to send as my personal email address instead of my gmail address. This way I have my own domain and I get to take advantage of Gmail's spam filter.

    The one thing that sucks about the set-up is that Gmail has a randomized timer that polls external accounts based on some algorithm and it can sometimes take 30 minutes for email to show up. To get around this I set up both accounts on most of my devices so that I can check my email server if the message isn't in Gmail.