Unblocking an email not in Blocked Conracts

Question

Level 1

8 points

a friend’s email has been blocked, but

•not by me

•not in my large Blocked Contacts list

•blocked list has no domain (pobox.com) nor ISP (Proofpoint.com) they use

•not showing as blocked in my contact record for this person, and I wouldn’t block them

•I can easily get text messages from them

Theirs is not the only one.

What in Ada Lovelace’s name is going on, and how do I fix this?

Error message they received:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

********@me.com

host mx02.mail.icloud.com [17.42.251.62]

SMTP error from remote mail server after RCPT TO:<*****@me.com>:

Reporting-MTA: dns; mail.rdwarf.net

Action: failed

Final-Recipient: rfc822;*****@me.com

Status: 5.0.0

Remote-MTA: dns; mx02.mail.icloud.com

[Edited by Moderator]

Posted on Oct 21, 2025 3:40 PM

Reply

Answer 1

Level 5

4,446 points

Don't know if this will help but I'll post it just in case

Pobox has migrated its services to Fastmail.

To unblock an email address, you will need to follow the steps within your Fastmail account settings:

Log in to your Fastmail account. You will likely use your Pobox reference address to log in.
Navigate to your settings (often found under a gear icon or your profile).
Look for sections related to Spam, Mail Rules, Senders, or Blocked Senders.
Find the list of Blocked Senders, Blocked Addresses, or Blacklist.
Locate the email address you wish to unblock and choose the option to Remove or Unblock