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I’ve been using Bluehost for several years. Recently (last six months or so, IIRC), they started using something called Cloudfilter to send email. At about that time, I started experiencing more bounced messages ONLY when I’m sending from my phone on the cellular network (I use AT&T). When I’m on my home LAN with my desktop or phone, all emails send perfectly (and I’m using AT&T fiber for Internet @ home).

It appears Cloudfilter uses Spamhaus and Spamhaus is blacklisting lots of AT&T cellular IP addresses. The bounce I get is:

xxxx@gmail.com host eig-east.smtp.a.cloudfilter.net [3.228.35.199] SMTP error from remote mail server after end of data: 550 Connection Rejected - see http://www.spamhaus.org/query/ip/108.144.20.225 AUP#BL

It seems foolish to me to blacklist cellular IP addresses. But Bluehost says they can’t do anything about it and I don’t have the time/energy to un-blacklist all the AT&T addresses @ Spamhaus.

So I’m thinking of switching to another hosting company like Dreamhost. Can anyone tell me whether I’m going to see a similar issue @ Dreamhost?

And does Bluehost control Cloudfilter? Or is that part of Cloudflare?

Any ideas/tips would be welcome. I’d switch to MS365 or Google for hosting but I’m trying to keep my costs down and flexibility up.

Thanks!
Roy

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I think it’s more an issue of any cell network, as those cell IP’s are easily spoofed, used in spam/scam attempts, and generally abused. You’re probably going to have similar issues no matter who your provider is, so long as you’re using cell to email.

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CloudFilter seems to be a tool from MailProtector.com.

Contact DreamHost and ask what they use for SPAM filtering; however, THIS page from DreamHost support does not mention CloudFilter. I’d still contact them to be sure.

PS: I’ve used PeoplesHost.com for years, although I use their Linux option (they do offer a Windows ASP.NET option). Support is great, prompt and friendly, even RTFM is polite :wink:

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Dynamic IPs are often blocked, not just mobile carrier IPs but home IPs too, this is because they are often abused. What I don’t understand, is why would the email be coming from your directly and not sending via your email system.

In your case, emails should go through bluehost before being delivered, so it should show their IP, not yours.

This may be a misconfiguration of your mobile email client.

What phone and what email client are you using?

It isn’t, and it’s not likely because it’s cellular, all dynamic IPs are on blacklists because this is where 90% of spam comes, before compromised and incorrectly configured systems.

What are you paying now, and what does flexibility mean in this sense?

FYI, IPs on mobile devices, like phones are often shared, not specific to you, so someone else may have abused this IP and now it’s on a blacklist, you have to wait it out, or email through the mailhost, so emails send from their IPs.

We’re going to need information on the email client though.

TIP, if you reply from your phone via webmail, this issue wont exist.

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