Mail Blocked By Cablevision / Optonline
Jun 29, 2008
I was recently required by my datacenter to change the IP addresses of my servers.
Since then, I have been unable to send mail from my servers to optonline.net addresses.
Optonline is owned by Cablevision, based in NY.
I tried contacting them repeatedly via e-mail (from a Yahoo account, since I'm blocked) and they do not respond. I've tried calling them, however their regular tech support will not talk to me since I'm not a customer, and I've been unable to to reach their IT department through any of their other phone numbers.
I contacted a mutual customer and had them call, and conference me in. They had me e-mail them some header info, and said they would research it. The next day they called my customer and told them that I was blacklisted for sending spam, and I had to fix it before they would accept my mail. They also said they were not allowed to discuss this with me directly.
I've checked all the blacklists published on their support site, and I'm not on any of them. They apparently are using another blacklist that they will not disclose that my my IP is on (which I've NEVER been able to send to them from since I was assigned it). I've checked against all the blacklists I can find, and I'm not on any of them.
Has anyone ever been successful in getting off their blacklists, and if so, how?
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Feb 13, 2009
After experiencing some issues with my long-time webhost, I decided to sign up with a new host. I did lots of reasearch, read reviews here and elsewhere, asked the hosts presales questions, etc. and finally settled on a particular host.
After signing up, I never received information about my account. I used the online chat, and the owner said that due to spam sent from their server the day before, it had been blocked by Verizon (my ISP) for a few days. So, I could not receive email from them at my Verizon acct. (which I use, instead of one associated with my website, for everything hosting-related).
Then, I found that I couldn't even access their website anymore. It, too, had been blocked by Verizon.
This made me very nervous so I asked for a refund and received it immediately. The owner of the hosting co. was very apologetic.
So, I went to my second-choice host. Once again, the welcome email didn't arrive. So, I asked them - through a support ticket - when it would come. They said it had been sent. I then found they'd sent me a number of emails, none of which had arrived. Very strange, I've never had a problem receiving mail sent to this email address before.
I asked if perhaps their mail server was blocked by Verizon too (told them what happened earlier in the day). They said no way, then came back and said yes, it was. Again, I asked for a refund. But, it's been 15 hours and I haven't had a reply to that.
I am now looking for yet another host - and would sure like to find one that's clear of this issue.
I've been developing websites since 1999 and have worked with a number of hosts, but this is the first time I've found this problem - and twice in the same day!
After all that, my question is:
Is there some way for me to tell in advance whether a particular server is blocked by my ISP?
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Jan 10, 2015
Is it possible to see what e-mails are blocked/prohibited by Plesk Outgoing mail control? Currently i've set a limit of 20 mails on each mailbox. Yesterday I received an e-mail that there were messages blocked. For me personally it would be good to see what the receivers email adresses are and optionally what the content of the e-mail was. This way I can find out if it was really spam or not.
If the e-mails weren't spam, is there a possibility to release and send them?
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May 14, 2009
i have vbulletin forum with 250,000 member
i tried to send a message to them so i used this blugin
[url]
and send 200 message every 10 minute
after 4 days my ip address are blocked from yahoo server
every mail i want to send i get this message
[TS03] All messages from xx.xx.xx.xx will be permanently deferred; Retrying will NOT succeed. See [url]
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Jan 20, 2008
All of a sudden my sites are not visible to me hosted in the same cirtex hosting account. I have verified that it wasn't spyware messing with my local computer and can view the site via a proxy. They use cpanel and there is no block visible, but there has to be something somehwere. I told them to restart and that did make the site visible until I checked in the morning, Where would a block be if this is it and is there a chance this was done by a hacker?
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Dec 30, 2007
how willing your ISP/carrier is to block one or multiple IP addresses that have may have been causing issues for you such as DDoS attacks, hackings etc.
What has been your experience? Please provide as much detail on your experience as possible.
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Jul 19, 2007
I am blocked by MSN. All email messages directed to any @hotmail.com address is rejected, here a typical message:
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
name@hotmail.com
SMTP error from remote mail server after MAIL FROM:<user@mydomain.com> SIZE=1802:
host mx3.hotmail.com [65.54.244.200]: 550 Your e-mail was rejected for policy reasons on this gateway. Reasons for rejection may be related to content such as obscene language, graphics, or spam-like characteristics (or) other reputation problems.
I have never spammed nor sent similar content as that listed above.
My host provider says they are contacting MSN for an explantion, but time is running and I need to find a solution to this, because I have some customers (hosted in my server) which need to answer to @hotmailers prospects on their product/services.
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Jun 28, 2009
I need to block a specific IP:
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It adds fine when I do:
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However, the IP is still accessing files and pages on the site according to Apache:
When I ban other IP's they are blocked from accessing anything on the server (e.g. it wouldn't even reach Apache level because of firewall), but this IP just isn't banning properly.
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Nov 5, 2009
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Oct 13, 2009
I have recently switched to GreenGeeks, great company and great support, but I am having a huge problem that all my clients and I are having problems with. No one can send emails to ATT, Verizon, Earthlink, Comcast, Etc. because they bounce back as being blocked. I have contacted them to unblock the IP and they do, but then a few days pass and it's blocked again. WTH? I've contacted GreenGeeks and they are aware of the problem but I really need to move on with this problem, does anyone know of any solution to do?
Example: ....
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Jul 8, 2009
We just got a new windows server and didnt put an antivirus or configure windows firewall, while setting up for the 1st two months.
our IP address has been blocked twice now by this company, on saturday, released on monday and blocked again on tuesday.
[url]
we applied to have it removed which they did and blocked it again, they claim we were spamming, which we never did
We have installed mcafee and setup windows firewall.
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Feb 3, 2009
One of my clients ran an e-mail bomber and gmail is blocking all emails from my server. I've searched but can't find a way to reach google or unblock the IP.
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May 25, 2009
I have exim mailserver (cpanel based),and when i send mails to some domains i have got the following error
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Feb 20, 2008
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If I enable Synflood checking, the load on the server increases, but the bandwidth usage decreases. But I'm wondering if 'good' visitors are getting turned away?
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Also, does the firewall simply drop the packets above 40?
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Nov 16, 2008
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May 4, 2008
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Apr 22, 2008
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Jul 25, 2008
i have a customer whos isp blocked both port 110 and 25, so far i was able to fix the problem with sending e-mails (port 25) but i cant see where do i change or add another port for receive email on my server, and since i cant do it... there is no point on opening a port in the firewall.
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Apr 9, 2008
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Jul 7, 2007
I setup php on my IIS in my box and i know i set it up correctly, but each time i reinstall it because of this error i keep getting it.
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66.221.255.17
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Dec 12, 2007
My user said he can not view his site from his IP address. His friend from the same ISP also canot access the site.
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Apr 23, 2007
My IP in clean from any blacklist/RBL databases but hotmail is blocking with the error message below:-
Remote host said: 550 Your e-mail was rejected for policy reasons on this gateway.
Reasons for rejection may be related to content such as obscene language, graphics, or spam-like characteristics (or) other reputation problems. For sender troubleshooting information, please go to [url]. Please note: if you are an end-user please contact your E-mail/Internet Service Provider for assistance.
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Aug 12, 2007
I've just got a fully manage VPS, unfortunately the newly aquired IP was listed in PBL (policy Block List)by spamhaus which is a nonspam source. I've got the ip de-listed but apparently some servers are still rejecting emails coming from this IP. It have been almost 48 hrs. Question is:
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2) What is the possibility of the IP being blacklisted by these servers forever? How long does it normally take for it to be totally in the clear?
3) What are the preventive measures that can avoid IP being listed?
4) Is configuring Reverse DNS PTR a standard procedure in server set-up and could missing that config be the main reason the IP got tagged?
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