Unable to Send messages. IP address reported "blocked"
I am having trouble sending out messages from my primary Spectrum email account through Thunderbird for the past month. I receive messages fine. I can send and receive messages through a separate Gmail account also in Thunderbird. I can use the Spectrum web based client and send messages for my Spectrum account (the one I can't send through Thunderbird). I can use Thunderbird from work and send and receive my Spectrum account messages (which is using a different IP address but the same Spectrum email account).
When I send a message to my Spectrum SMTP server from home Thunderbird reports back to me that my IP address is blocked. The specific message I get each time I try to send a message:
"An error occurred while sending mail: The mail server sent an incorrect greeting: impout002.msg.chrl.nc.charter.net cmsmtp xxx.xxx.xxx.xxx blocked. AUP#O-1100."
I have uninstalled and reinstalled Thunderbird (currently ver 60.6.1). I have deleted and reentered my SMTP configuration (even though it had not changed in years and was correct. It does not use port 25). I deleted my passwords from the password manager (even though they were reporting correctly) and reentered them when prompted.
I disabled antivirus (that also has been long standing). I checked the firewall on my router and there is nothing being blocked at my site.
Thunderbird is in online mode. My ISP Spectrum Charter say they have nothing to do with this, they direct me to the configuration settings which as I said above are correct and advise me to contact the client vendor. I have been through this list of suggestions... https://support.mozilla.org/en-US/kb/cannot-send-messages
I also made a pass through MozillaZine http://kb.mozillazine.org/Cannot_send_mail but can't find an appropriate direction or fix. Nothing had changed here except possibly a Thunderbird upgrade which occur from time to time. None the less the message telling me that my specific IP address is blocked seems very personal to me.
Any help or direction or who to contact to get my IP address unblocked in Thunderbird would be most appreciated.
Isisombulu esikhethiweyo
No this was from my home computer so connected on charter/spectrum.
For future reference, I have solved the problem. I thinking back we had had a power outage around the time that I started getting the blocked IP address message. It was only out for a few minutes but I suspect during that time I was reassigned a new IP address ( I do not have a static IP but the router is on 24/7 so effectively my IP address likely stayed pretty stable. I did try to restart the router and modem but that didn't work because I wasn't reassigned a new IP address in that reboot time. Today I shut the router and cable modem off all day while at work and once I rebooted everything 12 hours later I was reassigned a new external IP address. Now all is right in the world and the current IP address is not blocked when sending mail with Thunderbird. I apologize to anyone who gets my old IP address and can no longer send mail. Thanks for the thoughts and suggestions above.
Funda le mpendulo kwimeko leyo 👍 0All Replies (10)
What are your smtp settings? Try these:
mobile.charter.net on port 587, SSL/TLS, normal password authentication, User name = email address.
Thanks for replying. Yes those are the settings I am using for my SMTP server.
Additional information... so I had the idea if I used my VPN then maybe I could bypass the block. That worked. Everything else is the same except I connected through my VPN (which is using a completely different External IP address). Something has my specific IP address on a block list. I don't even have a clue to figure out who or why.
Maybe you can renew your IP:
I can try, though I think that will only renew my internal IP.
So, is this an issue with Thunderbird (which my ISP asserts) or somewhere else? Where does Thunderbird get its "blocked IP address" information from? Internal or external to Thunderbird? How does one go about appealing this block? Does anyone know who to talk to if the community support forum is not the appropriate avenue? I appreciate the above attempts by the community.
I can't say for sure, but I don't think TB has anything to do with setting your IP - it uses whatever is passed by the OS. The problem may be a temporary one caused by issues with the provider's server.
https://www.dslreports.com/forum/r32362425-HSI-Spectrum-Business-suddenly-rejecting-sent-email
Well I didn't expect Thunderbird had anything to do with it myself... but since I have been consistently told "Your eMail works fine on the Web Client then it isn't our problem" so here I am. Thanks for the dslreports find as that is the exact error message I am receiving. Though its now a month and it hasn't resolved spontaneously. I know I don't have a static IP address but it has been the same for some time now so I am not holding my breath. Shutting the router off to reset hasn't forced a change. Anyway I appreciate your thoughts and links.
Are you connecting to the internet using charter/spectrum?
Historically the prevented sending mail is you were using a wifi hot spot and friends homes not on charter.
Isisombululo esiKhethiweyo
No this was from my home computer so connected on charter/spectrum.
For future reference, I have solved the problem. I thinking back we had had a power outage around the time that I started getting the blocked IP address message. It was only out for a few minutes but I suspect during that time I was reassigned a new IP address ( I do not have a static IP but the router is on 24/7 so effectively my IP address likely stayed pretty stable. I did try to restart the router and modem but that didn't work because I wasn't reassigned a new IP address in that reboot time. Today I shut the router and cable modem off all day while at work and once I rebooted everything 12 hours later I was reassigned a new external IP address. Now all is right in the world and the current IP address is not blocked when sending mail with Thunderbird. I apologize to anyone who gets my old IP address and can no longer send mail. Thanks for the thoughts and suggestions above.