Nether.net Open Relay Blacklist: Any host that sends email to an invalid username @ puck.nether.net or @nether.net is tested to ensure that it is not an open relay. Due to the proliferation of spam due to open relays, we have found this to be a necessity. We perform the same tests that are performed if you were to telnet to mail-abuse.org from your mail server. You can check those tests by doing so. It does a reverse-connect to your IP and tests it for a various set of ways that one can send email that would turn out to pass through anti-relaying features.
DMARC is the key to improving Email Deliverability!
Email is the key to your customer communication strategy. But, what is your email reputation?
Setting up and managing your DMARC configuration is the key to getting insight into your email delivery. MxToolbox is the key to understanding DMARC.
MxToolbox Delivery Center gives you:
- Who is sending phishing email purporting to be from your domain
- What is the reputation of your domains and delegated IPs
- Where other senders are and What their reputations are
- How your SPF, DKIM and DMARC setup is performing
- What on-going maintenance you need to maintain and improve your email deliverability
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