Re: SMTP over SSH Tunnel error using putty: Corrupted MAC on Input

From: Darren Tucker (
Date: 03/09/05

Date: 09 Mar 2005 06:01:44 GMT

On 2005-03-08, Cadu <> wrote:
> Everything works just fine with POP, even with a large number or
> large size of messages. But I can't send large email, just small
> messages without attachments.
> When I try to send large messages, using Outlook or Eudora, over
> Putty 0.57 (the latest version) I get this message and the connection
> crashes:
> ---------------------------------------
> Server sent disconnect message
> "Corrupted MAC on input."

This is usually caused by faulty hardware or firmware. See:

The fact that it occurs sending large emails but not receive them seems
to indicate a problem with the outbound path so I'd check network
components first.

Darren Tucker (dtucker at
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    Good judgement comes with experience. Unfortunately, the experience
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