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Diffstat (limited to 'fetchmail-FAQ.html')
| -rw-r--r-- | fetchmail-FAQ.html | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/fetchmail-FAQ.html b/fetchmail-FAQ.html index d4fe8bc0..18599d6d 100644 --- a/fetchmail-FAQ.html +++ b/fetchmail-FAQ.html @@ -10,7 +10,7 @@ <table width="100%" cellpadding=0><tr> <td width="30%">Back to <a href="index.html">Fetchmail Home Page</a> <td width="30%" align=center>To <a href="/~esr/sitemap.html">Site Map</a> -<td width="30%" align=right>$Date: 2000/10/08 14:34:19 $ +<td width="30%" align=right>$Date: 2000/10/17 21:52:38 $ </table> <HR> <H1>Frequently Asked Questions About Fetchmail</H1> @@ -138,6 +138,7 @@ my Received headers as it should.</a><br> <a href="#X4">X4. My mail is being mangled in a new and different way.</a><br> <a href="#X5">X5. Using POP3, retrievals seems to be fetching too much!</a><br> <a href="#X6">X6. My mail attachments are being dropped or mangled.</a><br> +<a href="#X7">X7. Some mail attachments are hanging fetchmail.</a><br> <h1>Other problems:</h1> @@ -2713,6 +2714,27 @@ understand its attachments, so it really shouldn't be used at all), and make sure dtmail is set to use MIME rather than mailtool's format.<p> <hr> +<h2><a name="X7">X7. Some mail attachments are hanging fetchmail.</a></h2> + +This isn't fetchmail's problem either; fetchmail doesn't know anything +about mail attachments and doesn't treat them any differently from +plain message data.<P> + +The most usual cause of this problem seems to be bugs in your network +transport layer's capability to handle the very large TCP/IP packets +that attachments tend to turn into. You can test this theory by trying to +download the offending message through a webmail account; using HTTP +for the message tends to simulate large-packet stress rather well, and +you will probably find that the messages that seem to be choking +fetchmail will make your HTTP download speed drop to zero.<P> + +This problem can be caused by subtle bugs in the packet-reassembly +layer of your TCP/IP stack; these often don't manifest at normal +packet sizes. It may also be caused by malfunctioning path-MTU +discovery on the mailserver. Or, if there's a modem in the link, +it may be because the attachment contains the Hayes mode escape "+++". + +<hr> <h2><a name="O1">O1. The --logfile option doesn't work if the logfile doesn't exist.</a></h2> This is a feature, not a bug. It's in line with normal practice for @@ -2919,7 +2941,7 @@ install Linux on your server...<p> <table width="100%" cellpadding=0><tr> <td width="30%">Back to <a href="index.html">Fetchmail Home Page</a> <td width="30%" align=center>To <a href="/~esr/sitemap.html">Site Map</a> -<td width="30%" align=right>$Date: 2000/10/08 14:34:19 $ +<td width="30%" align=right>$Date: 2000/10/17 21:52:38 $ </table> <P><ADDRESS>Eric S. Raymond <A HREF="mailto:esr@thyrsus.com"><esr@snark.thyrsus.com></A></ADDRESS> |