Pablo Medina wrote:

Hi all.
Hope someone can help me

I am running a qmail/vpopmail/maildrop installation in a mail box.
Yesterday the box stopped receiving mail. All mail was rejected with
the error:

"421 unable to read controls"

After a quick search in the net i solved it chmodding

But i was yet to discover what could cause this , as this box was
running smoothly for months.

The last think i did was add and delete a domain via popmaild. So
today i tried again. Logged to the server via popmaild


and bang...the server stops receiving mail.

bash-3.00$ telnet 25
Connected to
Escape character is '^]'.
421 unable to read controls (#4.3.0)

vpopmail version is : 5.5.3 (downloaded from

I think you want to stay in the 5.4.x-tree, if you want to run it on a production-system and keep your sanity.
(And your customers)


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