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http://bugs.exim.org/show_bug.cgi?id=1426
Summary: smtp_ratelimit_rcpt with factor less than 1.0
Product: Exim
Version: 4.72
Platform: x86
OS/Version: Linux
Status: NEW
Severity: bug
Priority: low
Component: SMTP Authentication
AssignedTo: pdp@???
ReportedBy: ij.exim@???
CC: exim-dev@???
When using smtp_ratelimit_rcpt with a factor less than one (1)
the delay tends to zero. When reaching zero (or close to zero)
Exim smtp receiver hangs when performing the (zero) delay operation.
Test case: set smtp_ratelimit_rcpt in config, submit a message to
multiple recipients.
smtp_ratelimit_rcpt = 0,18s,0.1,1m
Send a message to at least 8 recipients.
The debug log shows the delay period value and pauses during the delay.
When period gets close to zero, Exim delays indefinitely.
Can probably be fixed simply by adding a test for a delay of zero
around the call to sleep/delay.
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The intended use-case by user, using a setting of "0,18s,0.1,1m",
is to delay the response for the first RCPT command, then
respond more rapidly to any subsequent recipients commands.
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