-- from an earlier post in this thread: 2021-08-06 01:16...

[mdk]

@Jim89 -- from an earlier post in this thread:

2021-08-06 01:16 AM --- AUP#SNDR blocking

AUP ==> Appropriate Usage Policy

SNDR ==> The E-mail ID in the "From:" field of messages that you are sending.

BLOCKING ==> Shaw's E-mail filters are keying on that ID.

So, what is in the "From:" field of the messages that you send? A valid Shaw E-mail ID?

Contact Shaw, and ask them why your ID, as the "sender" is being blocked.

[swhl28]

Try your way again with an attachment and let us know the result. Thanks.

[mdk]

@Jim89 -- if you access the My Shaw Portal, and create a new E-mail ID, can you send from that ID, while not being able to send from your current ID?

Can you send a "plain" message from your current ID to your new ID?

Can you send the same message from your new ID to your current ID?

Results ???

Any feedback from Shaw why one ID is "blocked" ? Could it be a case of the password for your E-mail ID has been "hacked", and used inappropriately, which caused Shaw to disable that ID?

[shaw-darren]

One of the best ways to troubleshoot this issue would be to try forwarding or sending emails directly through Webmail. We need to isolate what may potentially be causing this "block" before we can address the problem. 

Some ways to do that may be to send emails to a different email address, forward them to yourself, use Webmail instead of Thunderbird, or even try sending from another device. You can also find many free websites online that allow you to check whether an email address is listed on a public Blacklist. 

These tips may help narrow down the cause of the problem but I recommend chatting with us directly so we can get some private information to help us investigate more thoroughly. Please reach out to us at shaw.ca/chat

[mdk]

@shaw-darren -- Please reach out to us at shaw.ca/chat

See: https://support.shaw.ca/t5/billing-account-discussions/ritika-wmbj/td-p/59028

for a very unsatisfactory "online chat" session.

AUP#SNDR --> Appropriate Usage Policy # Sender ("From:" field in headers of the outgoing E-mail).

[winann]

Mail that I receive I cannot forward. It is downright annoying. Find another way to solve your problem and stop interfering with legitimate mail.  

[mdk]

@winann -- mail that I receive I cannot forward.

If you are getting the "AUP#SNDR" message, then an earlier post in this thread may be relevant:

2021-08-06 01:16 AM ---- AUP#SNDR blocking

AUP ==> Appropriate Usage Policy

SNDR ==> The E-mail ID in the "From:" field of messages that you are sending.

BLOCKING ==> Shaw's E-mail filters are keying on that ID.

Either:

1. within your E-mail client, change the value that it uses in the "From:" field, and experiment: forward one message.

2. contact Shaw Support (1-888-472-2222 or www.shaw.ca/chat ) to get them to tell you why their mail-server is blocking E-mail from your E-mail ID.

[GarryGee]

IT 2024-04-21 AND THIS IS STILL HAPPENING even though i have contacted Shaw tech support severtal times in the past.

I  just spent over an hour with shaw support again about not being able to reply to message received on my shaw email account from within Outlook.  Been working for years and now when trying to respond to an email received using reply, (within outlook where message was received ), the reply gets thrown into Outbox and message will not send.  Get message :

shw-obgw-4003a.ext.cloudfilter.net cmsmtp 185.153.179.121 is listed on Cloudmark CSI-Global. Please visit:// https AUP#IPBL1000.      and followed by

<xxxxx.shaw.ca> message rejected. AUP#SNDR.   where xxxxx.shaw.ca is my user name. 

Something has changed within Shaw's spam filtering or SMTP server setting that is making this problem appear.  

their response is that they don't support Outlook so there is nothing they can do... or more likely have not idea what to do to fix their own problem.

But I have been using this for many years and  now it just doesn't work. 

Shaws lack of dedication to customer service is very disappointing and I question why I continue staying with them as opposed to switching to another provider.

[rstra]

@GarryGee  It looks like the email you are replying to is blacklisted. Can you reply to the email through webmail?

[mdk]

@GarryGee showed:

shw-obgw-4003a.ext.cloudfilter.net cmsmtp 185.153.179.121 is listed on Cloudmark CSI-Global. Please visit:// https AUP#IPBL1000. and followed by

<xxxxx.shaw.ca> message rejected. AUP#SNDR. where xxxxx.shaw.ca is my user name.

That IP-address belongs to a "NordVPN" gateway. Do you get the same error-message when NOT using a VPN?

You (or NordVPN) will need to contact "Cloudmark CSI-Global" to get that IP-address removed from their black-list of IP-addresses.

Note that spammer/scammers sometimes use a VPN to "hide" their actual IP-address.  This abuse may result in the IP-address getting listed/removed/listed/removed/listed.  Sigh.