-- I cannot send a message using a sender xxx@uniserve.co...

[mdk]

@alfrednykolyn -- I cannot send a message using a sender xxx@uniserve.com.

Are you really using "xxx", or are you hiding the actual ID that you have on Uniserve?

Shaw's mail-server is querying, in near-real-time, whether "xxx" is a valid ID on the Uniserve system.

When I tried sending, using/abusing the ID "support@uniserve.com", then I did not get the error-message.

If I slightly change the domain-name, by adding one "x", I get:

   550 <xxx@xuniserve.com> sender rejected. AUP#DNS

Shaw's mail-server recognizes that there are no DNS-servers for the "xuniserve.com" domain, and thus rejects my attempt. Good for them for blocking "bad" E-mail IDs that spammers try to use.

[ChriseB]

I tried this and I still get an error... 😞

[ChriseB]

I tried that and still not working. Weird thing is that it worked until I moved and changed modems, both Shaw fibre ones. It used worked on the old cable modem that was here before.

[mdk]

@ChriseB -- can you please give more detail:

1. E-mail client on your computer

2. Configuration of that client: outgoing SMTP-server, TCP-port number, authentication or not

3. Confirm that your computer is connected to a cable-modem provided by Shaw, not by you, and not by Uniserve

4. Whether you have temporarily configured your E-mail client to use "support@uniserve.com" in the "FROM:" field

5. The text of any error-message(s) that have been generated

These "technical" details will help replicate your setup, as a comparison.

[ChriseB]

Well, today I finally got it to work. I am using Windows Live mail. It is using smtp.shaw.ca and set to use my shaw id & pswd to authenticate sending. Hopefully it will stay working now. Thanx.

[ChriseB]

And today it is not working again even though nothing has changed...

Error:

An unknown error has occurred.

Subject 'test'
Server Error: 550
Server Response: 550 <ageektogo@uniserve.com> sender rejected. AUP#SNDR
Server: 'smtp.shaw.ca'
Windows Live Mail Error ID: 0x800CCC69
Protocol: SMTP
Port: 25
Secure(SSL): No

I am using Windows Live mail It is using smtp.shaw.ca and set to use my shaw id & pswd to authenticate sending. 

I am connected to a Shaw Modem that was installed by a Shaw Tech.

Tried the support@uniserve.com and got this error:

An unknown error has occurred.

Subject 'test'
Server Error: 550
Server Response: 550 <support@uniserve.com> sender rejected. AUP#SNDR
Server: 'smtp.shaw.ca'
Windows Live Mail Error ID: 0x800CCC69
Protocol: SMTP
Port: 25
Secure(SSL): No

Thanx for any help I can get.

[Zenj]

Hi

I'm having a similar problem (sender rejected: AUP#SNDR) and wondering if you found a solution?

thanks!

[mdk]

@Zenj -- AUP#SNDR

AUP ==> Appropriate Usage Policy

SNDR ==> Sender

In the Spring of 2021, Shaw outsourced E-mail processing. So, "what worked before" may not work today.

Shaw's mail-servers do try to authenticate the E-mail ID that you put into the "FROM:" field of your outgoing E-mail, but only for some domains, including UNISERVE and TELUS. If the E-mail ID is not valid on those domains, you get the "AUP#SNDR" error-message.  This blocks spammers who has exploited the computer of a Shaw customer from sending "spam" E-mail through that compromised computer.

So, what ID are you putting in the "FROM:" field?

[Zenj]

Hi

It's a non-shaw email id (my own domain).

I use Eudora to access 3 emails - a Shaw email, a gmail account and a third one causing me issues when I send an email.The shaw emaiI is the dominant email so all outgoing messages use the Shaw server. I can send message using my shaw and gmail accounts - no errors.

I have had this setup for many years without any issues. I could send messages on Sept 2; the problem started occurring on Sept 3. I haven't changed any settings (unless something got messed up in Eudora in the background).

[rstra]

@Zenj You will have to use the email server settings for your third party account.