From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Mon Apr 03 2006 - 19:43:50 CDT

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On Mon, Apr 03, 2006 at 04:59:50PM -0700, wellssrimortgage.com wrote:

> my postfix behind a firewall that always kills connections after 10
> minutes, regardless of activity, I changed that , so the attachment size
> problem is gone.

Postfix does not do that. The smtpd(8) server kills connections after
300s ($smtpd_timeout) of *idle* time. If large attachments fail to
be delivered without being rejected as too large, frequently the
problem is broken PATH MTU discovery (often caused by firewalls
that block ICMP).

--
        Viktor.

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