Before posting a new question, please check out our Internet / WiFi and Spectrum TV App troubleshooting pages for common issues, as well as useful information to include in your post.

Advanced Search Options

We have advanced search options to make it easier to locate posts, questions and answers on this community.
More information can be found at Advanced Search Options
If you are looking for something specific, please check if someone else has already asked or answered the same question.
You are currently viewing the Spectrum Community Archives
This content may be outdated or inaccurate
All posts are closed and commenting has been disabled

If you have a question or comment, please start a new post (registration is required)

Leave the Archive

Frequently Asked Questions

(Quick links to the current most searched topics)
How can I pause and rewind live TV using the Spectrum TV app?
Spectrum TV App Supported Devices

Issue with SMTP from Thunderbird

RicmusicianRicmusician Posts: 3 Spectator
edited August 2022 in Spectrum Archives: 2020 - Present Jan 11, 2021

I get the following error when trying to send email from Thunderbird using my Spectrum email account (from the domain); this started yesterday. I called and spoke to 2 different Spectrum support people who did not seem to understand what the problem is.

An error occurred while sending mail: The mail server sent an incorrect greeting: cmsmtp 94.198.xx.xx blocked. Please see for more information. AUP#Out-1130.

I looked up the error code and it states that the IP address I'm sending from has an issue with DNS; the IP address I'm using is a Spectrum IP address and I'm not using a VPN. It also states that if the IP address is a Spectrum-provided email address to contact support. Well I contacted support and they don't have a clue what's wrong. Clearly this is an issue on the Spectrum side.

Best Answer

  • RicmusicianRicmusician Posts: 3 Spectator
    Jan 19, 2021 Answer ✓

    It's a moot point now; the day after I posted this it started working; no configuration changes on my end. The original issue was not with POP it was with SMTP, but thanks anyway.


  • James_MJames_M Posts: 3,953 ADMIN
    Jan 11, 2021

    Do you get an error when you try to send the email from Spectrum Webmail?

  • RicmusicianRicmusician Posts: 3 Spectator
    edited January 2021 Jan 11, 2021

    No but why is my SMTP traffic being routed through 94.198.xx.xx? My POP3 traffic is fine, meaning I can receive email in Thunderbird, I just can't send.

  • Julia_RJulia_R Posts: 4,661 Contributor
    Jan 15, 2021

    What do you have in for your SMTP server? Wondering why you are still using POP?

    Can you send email through Thunderbird when not on your home network?


  • ddeerrffddeerrff Posts: 154 Contributor
    Jan 16, 2021

    Julia, not to hijack the thread, but has Spectrum updated their email server software? Last I knew, Thunderbird and your mail server had a conflict when trying to use imap. Don't recall the exact details, but Thunderbird adheres strickly to a standard that your older email server software does not, and it results in incoming mail not being seen in the inbox. POP3 still works fine.

  • AgainTooAgainToo Posts: 27 Contributor
    Jan 19, 2021

    @ddeerrff I use Thunderbird with IMAP with no problems, and have been for several years now.

    incoming:; port 993; SSL/TLS; normal password; username is email address

    outgoing:; port 587; STARTTLS; normal password; username is email address

    I don't know if that will help you or not, but I thought I would post it anyway.

  • ddeerrffddeerrff Posts: 154 Contributor
    edited January 2021 Jan 19, 2021

    Look here: , just part of my search for answers a year and a half ago. Unless it has been updated, the Spectrum IMAP server is not RFC-3501 compliant. Maybe it has been updated, or maybe Thunderbird has been modified to send the redundant 'Fetch' command. Anyway, last time I tried to set up an IMAP account on Spectrum using Thunderbird, new emails were not being seen by TB. Went back to POP3 and all is well. Not sure I want to waste my time trying IMAP again.

  • DawterDawter Posts: 20 Participant
    Jan 25, 2021

    WHEN will they fix this? Sometimes I can send emails, sometimes I get this message:

    January 25 2021-

    An error occurred while sending mail: The mail server sent an incorrect greeting: cmsmtp blocked. Please see for more information. AUP#Out-1130.

    Then it takes me in circles.......*sigh*

This discussion has been closed.