Quote:
Originally Posted by camner
...Can you explain a bit what you mean by ?Use aliases set to reject delivery to block specific usernames at your own domain"? Does this mean to set up an alias and just point it to "nobody"?
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No, that's not what I meant.
- Go to the Settings>Aliases screen.
- Click New Alias at the top.
- Enter a new email address at your domain, such as sp @ yourdomain
- Removing the Deliver to address will not prevent messages sent to that alias from being delivered to your account.
- But you can choose a Restrict senders policy of "Reject (bounce) all mail sent to this address (disable the alias)".
- Click Save at the top to save and exit. Click Settings>Mail to go back to your message list.
If you have a wildcard delivery alias set up for your domain, the steps above will disable a single alias at your account. You can repeat these steps to block other aliases which are being used by spammers. The sending server will not be able to complete the connection to the Fastmail incoming server, since during the initial portion of the connection the destination email address is specified, and the Fastmail incoming server will reject the connection with this SMTP error code:
Code:
550 5.1.1 <sp@example.com>: Recipient address rejected: User unknown in virtual mailbox table
This is the best possible way to disable that alias, since the sending system is told that the mailbox does not exist.
Bill