We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Rohkem teavet

Teema arhiveeriti. Please ask a new question if you need help.

Cannot send messages after installing Thunderbird

  • 3 vastust
  • 0 on selline probleem
  • 4 views
  • Viimati vastas sfhowes

horstingsfarm
horstingsfarm
more options

We just got two new office computers and Windows Mail sucks.

So I downloaded Thunderbird, and set up my accounts as described by both Shaw's website and Thunderbird's.

Everything seemed to be working ok until I tried sending my first email. I got this message:

Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: shw-obgw-4003a.ext.cloudfilter.net cmsmtp Connection Rejected - see http://www.spamhaus.org/query/ip/207.194.98.229 AUP#IPBL00001.

I tried changing the port to 2525 as I read in a Thunderbird forum that worked for some, but it just changed the error message slightly...

Any assistance would be greatly appreciated, as I just want a mail app that I can create folders in!

We just got two new office computers and Windows Mail sucks. So I downloaded Thunderbird, and set up my accounts as described by both Shaw's website and Thunderbird's. Everything seemed to be working ok until I tried sending my first email. I got this message: Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: shw-obgw-4003a.ext.cloudfilter.net cmsmtp Connection Rejected - see http://www.spamhaus.org/query/ip/207.194.98.229 AUP#IPBL00001. *** I tried changing the port to 2525 as I read in a Thunderbird forum that worked for some, but it just changed the error message slightly... Any assistance would be greatly appreciated, as I just want a mail app that I can create folders in!
Attached screenshots

All Replies (3)

horstingsfarm
horstingsfarm Küsimuse esitaja
more options

I should also mentioned I followed all these steps to troubleshoot, besides resetting SMTP Password [through my ISP] and verifying that my mail server (Shaw) supports the minimum version of TLS, although I did follow the suggested steps to lower the bar to see if that was the issue, but it didn't make a difference.

david
david
  • Top 10 Contributor
more options

This is not related to Thunderbird. The URL at https://check.spamhaus.org/listed/?searchterm=207.194.98.229 provides some tips in resolving this. I suggest checking with your email host for assistance in this.

sfhowes
sfhowes
  • Top 10 Contributor
more options

The settings for the Shaw smtp are: mail.shaw.ca on 587, STARTTLS, authentication = normal password, User Name = part of address before @. If the error remains, state your antivirus and VPN if you use one.