[Bug 3159] New: Exim fails to deliver paniclog email when it contains long lines

https://bugs.exim.org/show_bug.cgi?id=3159

            Bug ID: 3159
           Summary: Exim fails to deliver paniclog email when it contains
                    long lines
           Product: Exim
           Version: 4.96
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: bug
          Priority: medium
         Component: Logging
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]

When exim paniclog email contains lines longer than 1000 characters, it fails
at delivering it because it violates SMTP specifications (RFC 5321): "message
has lines too long for transport". In other words, exim is dropping its own
email and fails to report the original issue reported by paniclog.

To fix this issue, exim should ensure it wraps line in its paniclog email
("exim paniclog on <domain> has non-zero size") to less than 1000 characters
per line.

I didn't find any workaround except deliberately violating the RFC with
IGNORE_SMTP_LINE_LENGTH_LIMIT=1, which does not seem like a good idea.

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