@Andy_Nwrote:
Edit: If your IP address at the time was on the SBL, then a simple router power cycle should get you a new IP address, which could simply solve the issue - unless you have devices that are not behaving correctly connected to your network. In which case the new IP address could easily be added again. But check for that proxy.
Sigh - I get so cheesed off with this sort of advice.
1. You should ask when was the last time the OP rebooted the router? On thing people don't get about DHCP is this:
It's purpose was never to allow you to change your IP address willy- nilly.
Rather it is to allow a network adapter a means of configuring itself using information provided by the network it finds itself attached to.
2. Getting rid of a blacklisted IP address doesn't solve your problem, if you are infected then you will end up back on the CSS. In the meantime whoever gets your old IP ends up suffering the effects of the blacklisting.
3. If you are on the CSS - it means that a spambot has been detected on your network. The CSS responds to reports of traffic attempting to deliver mail to inbound servers on port 25. Therefore if you ignore the problem:
- It makes you as bad as the spammers IMHO - If as I'm sure you hate spam, you should do anything you can do to stop it coming from your network.
- Even more importantly you don't know what else the malware is doing. Malware today is getting very sophisticated, and besides performing it's primary role - also downloads other malware, as well as seeks to mask itself from anti virus programs.
So it's not only in the interests of the internet community at large that you want to resolve this. It's also in your own self interest.
Please note that while working with users on the VirSony Media Forum we have come across the following devices with Malware:
2 Firesticks - with non standard software added.
1 Sony Smart TV
2 PC's that clearly showed they were transmitting malware when checked with Wireshark but failed to turn up a positive on antivirus scans,
If I've caused offence then I apologise, but as you may gather, I am very passionate about this, and sometimes get ahead of myself. I have written a post on the Virgin Media Forum's which the Forum staff have made into a sticky post dealing with a suggested method of identifying spam traffic on a network.
https://community.virginmedia.com/t5/Security-matters/Searching-for-Spambots-on-your-network/td-p/40...
While I used a Windows 10 PC for the task - it should be possible to do something similar on an Apple Mac with a wifi hotspot. Sadly I don't own a Mac myself so I can't write a similar post for Apple users.
Finally with regard to the original post.
I do know that Mac mail does offer the ability to choose another configured smtp server to deliver the mail. So I think the last part of the error message, rather than being the actual error, was Mac mail offering to do that.
Tim
