[exim-dev] [Bug 1687] New: Option to limit the length of a p…

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Προς: exim-dev
Καινούρια Θέματα: [exim-dev] [Bug 1687] Option to limit the length of a physical (header?) line
Αντικείμενο: [exim-dev] [Bug 1687] New: Option to limit the length of a physical (header?) line
https://bugs.exim.org/show_bug.cgi?id=1687

            Bug ID: 1687
           Summary: Option to limit the length of a physical (header?)
                    line
           Product: Exim
           Version: 4.85+ HEAD
          Hardware: All
                OS: All
            Status: NEW
          Severity: wishlist
          Priority: medium
         Component: Mail Receipt
          Assignee: nigel@???
          Reporter: hs@???
                CC: exim-dev@???


It seems that other mail systems refuse to accept messages with overlong header
lines (I suppose, the OP is talking about physical lines). They just close the
connection.

Some problems arise in such a case, since Exim notes this as a 'host problem',
not a 'message problem' in it's retry data base.

The best way to avoid such situation would be

- an option, that blocks such messages already during the receipt
- an option, that allows folding such overlong physical header lines

It should be thought about the this option

- as an ACL element?
- as an expandable global option?

(I'm just writing this wishlist item, because I don't want to forget this
issue.
It can be discussed on the exim-dev list)

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