topic Re: Blocked IP addresses in Broadband

Blocked IP addresses

ianewest — Tue, 20 Dec 2022 19:10:22 GMT

For many weeks, I've been unable to email anyone with a hotmail or outlook address. The delivery failure messages tell me that my IP address is 'on our block list (S3140)'. Except that I don't recognise the IP addresses quoted. They are not always the same but an IP address look-up places them in various parts of the US. I'm sure my traffic via Plusnet is not routed via the US but the people who host my mail server are adamant they are not part the network that they use. Any ideas?

Re: Blocked IP addresses

jab1 — Tue, 20 Dec 2022 19:19:29 GMT

Welcome to the forums @ianewest . Could be that that your IP address is one brought over here by BT (PN's owners), and it is possible Microsoft (Hotmail/Outlooks owners) think you are still over there, although that should not cause the block you are describing. Can you post the first three octets of your address, and I'll check - or you could see where those addresses are registered yourself by looking at the output from here:- https://iplocation.io/

Re: Blocked IP addresses

ianewest — Tue, 20 Dec 2022 21:16:08 GMT

Thanks for the welcome and swift response. As I said, I have previous looked up the IP addresses and they are located in the US, so my question is how come? If it helps, those cited in some recent delivery failure notifications are:

192.185.149.77

192.185.152.11

192.185.184.18

They all seem to be associated with a US company called Network Solutions. The people who host my mail server deny any connection and say it must be my ISP, but I am not convinced.

Re: Blocked IP addresses

jab1 — Tue, 20 Dec 2022 21:21:24 GMT

As you say, these are located in the U.S., and have zero connection with Plusnet. Can you provide a full copy of a couple of these rejection notifications?

Re: Blocked IP addresses

ianewest — Tue, 20 Dec 2022 21:29:41 GMT

Thanks, that's what I assumed. The typical messages are:

outlook-com.olc.protection.outlook.com[104.47.73.33] said: 550 5.7.1

Unfortunately, messages from [192.185.184.18] weren't sent. Please contact

your Internet service provider since part of their network is on our block

list (S3150). You can also refer your provider to

http://mail.live.com/mail/troubleshooting.aspx#errors.

[DM6NAM04FT015.eop-NAM04.prod.protection.outlook.com] (in reply to MAIL

FROM command)

Re: Blocked IP addresses

jab1 — Tue, 20 Dec 2022 21:38:37 GMT

At a guess, your mail host is being, shall we say, a little untruthful. Unfortunately, my mail knowledge is a little rusty, and I'm unavailable for most of tomorrow, but I will tag a Community member with greater experience. Who is your mailhost, if you don't mind me asking?

@Townman - any thoughts?

Re: Blocked IP addresses

Townman — Tue, 20 Dec 2022 23:01:32 GMT

Is there a VPN in use here?

Re: Blocked IP addresses

jab1 — Tue, 20 Dec 2022 23:08:42 GMT

Never thought of that - must be getting over-excited about my fortnight off. 😀

Re: Blocked IP addresses

ianewest — Wed, 21 Dec 2022 09:04:51 GMT

I haven't set one up.

Re: Blocked IP addresses

MisterW — Wed, 21 Dec 2022 10:01:30 GMT

who provides your mail hosting ?

Re: Blocked IP addresses

Townman — Wed, 21 Dec 2022 10:35:37 GMT

@ianewest wrote:

If it helps, those cited in some recent delivery failure notifications are:

192.185.149.77

...

I am minded to confirm that we have not been pointed in the wrong direction - what is YOUR IP address - What's My IP Address? Networking Tools & More (whatsmyip.org)

Is it the same as that displayed in the router WAN information (Broadband IP address)?

Re: Blocked IP addresses

bobpullen — Wed, 21 Dec 2022 16:31:35 GMT

$ whois 192.185.184.18 # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2022, American Registry for Internet Numbers, Ltd. # NetRange: 192.185.0.0 - 192.185.255.255 CIDR: 192.185.0.0/16 NetName: HGBLOCK-10 NetHandle: NET-192-185-0-0-1 Parent: NET192 (NET-192-0-0-0-0) NetType: Direct Allocation OriginAS: Organization: WEBSITEWELCOME.COM (BO)

Note the organization [sic].

Then see below from here: -

Don't suppose it's Hostgator that are are hosting your email is it? If it is, then they're misinforming you.

Re: Blocked IP addresses

ianewest — Wed, 21 Dec 2022 16:55:35 GMT

Hi,

Thanks for the very useful information. The company who provide my domain are not the actual hosts of my mail service, so I'm awaiting clarification of who the current provider is. I'll respond further when I've heard back from them.