Category: Linux

rblsmtpd 451 Sender has sent to LashBack

johniLeave a comment

Bounce message received:

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:

[email protected]

Malformed SMTP reply from mail.server.com [192168.1.1]
in response to initial connection:
rblsmtpd: 192.168.6.62 pid 14483: 451 Sender has sent to LashBack
Unsubscribe Probe accounts:
retry timeout exceeded

Looking further into this it appears that the sending IP address was listed in a RBL black list.  The RBL server being queried was: ubl.unsubscore.com

This in turn (www.unsubscore.com) took me to: http://www.lashback.com/support/UnsubscribeBlacklistSupport.aspx

Most RBL systems return a useful message with a URL, but, not lashback.

There was an error deleting messages from the folder “Inbox”. This is what the server said: [TRYCREATE] Mailbox does not exist.

johniLeave a comment

A client was trying to delete messages from their mailbox using Horde webmail on a Plesk linux system.  They received the following error:

There was an error deleting messages from the folder “Inbox”. This is what the server said: [TRYCREATE] Mailbox does not exist.

Turns out that they had enabled a setting in the “Options->Deleting and Moving Messages” area which was:

When deleting messages, move them to your Trash folder instead of marking them as deleted?

Disabling this setting allowed delete to work again fine.

URL: When I try to delete a message from webmail it fails with: ‘There was an error deleting messages from the folder “Inbox”. This is what the server said: [TRYCREATE] Mailbox does not exist.’