Unable to send email to our club members alias

Yes 23.83.212.6 was blocked I have removed the block for that IP.

That is one issue with using cheap shared hosting, you are put on the same services as spammers and hackers.

Thanks. But, I wonder whether this will be sufficient. The mail is being sent via mailchannels.net, and it appears that the IP address could rotate to load balance.

Here is another record from another email with another IP address:
Received-Spf: Pass (protection.outlook.com: domain of kromann.net designates 23.83.209.25 as permitted sender) receiver=protection.outlook.com; client-ip=23.83.209.25; helo=bumble.birch.relay.mailchannels.net;

Is this IP also blocked? If so, I wonder if it's not necessarily Dreamhost that is being blocked but the entire (or most of the) block of relay.mailchannels.net IP addresses. And if so, why? What does it take to get an IP on your blocklist? What would it take to give relay.mailchannels.net the green light again?

As I said using a shared system you are sharing the mail service with spammers. You need to talk to your host to get your email sent from same IP all the time. They are the ones hosting the spammers which we have to defend against.

Brian wrote: As I said using a shared system you are sharing the mail service with spammers. You need to talk to your host to get your email sent from same IP all the time. They are the ones hosting the spammers which we have to defend against.

Hi Brian,
I'm the CEO of MailChannels. We use extensive technology to get rid of spam and phishing before it goes out the door. If you have any concerns about email received from our netblocks, please send samples to abuse@mailchannels.com and a real human will review the message and make sure it's followed up.

We do ask our customers to configure an all-inclusive SPF record because we send traffic from over 4,000 IPs on behalf of 2.5 million domain owners; the IPs are all shared. No customer has a dedicated IP.

Thanks and good luck.

I will remove your IP blocks for now, but all future spam from mailchannels.com will be forwarded to you personally and the spamming server IP range blocked.

Thank you! I have since sent mail successfully to the member aliases several times.

Paul