[exim-dev] [Bug 1874] Exim 4.87 silently losing email to our…

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Autor: admin
Datum:  
To: exim-dev
Betreff: [exim-dev] [Bug 1874] Exim 4.87 silently losing email to our local mail stores (failing to retry lmtp deliveries)
https://bugs.exim.org/show_bug.cgi?id=1874

--- Comment #7 from David Carter <dpc22@???> ---
> You could look at max_parallel instead of serialize_hosts. But that isn't the
> issue...


Indeed, and I imagine that we would see the same problem if the rate limiting
was done by limiting concurrent connections at the Cyrus end.

> I assume you're hard-assigning users to mailstores, and splitting
> them out in a router? Could I see (the guts of) that?


localpartlist hermes_active = cdb;USERS/cyrus_active.cdb

Router:

# Deliver most Hermes addresses to Cyrus via LMTP. We don't need to do
# any address data handling at delivery time. The byname option causes
# Exim to skip the DNS lookup, which will fail anyway because the
# intramail names are not in the DNS, and which may cause delivery
# delays if the DNS does not work (e.g. because of a network outage).
# We work around interop problems in Cyrus by using an alternative
# transport if there are any zero bytes in the message.

hermes_lmtp:
  driver                = manualroute
  local_part_suffix     = +*
  local_part_suffix_optional
  no_verify
  domains               = hermes.cam.ac.uk
  local_parts           = +hermes_active
  condition             = SUBADDRESS_PARANOIA
  route_data            = $local_part_data byname
  host_find_failed      = defer
  retry_use_local_part
  transport             = ${if ={0}{$body_zerocount} \
                               {hermes_lmtp} {hermes_lmtp_filter} }


Transports:

hermes_lmtp:
  driver                = smtp
  protocol              = lmtp
  gethostbyname         = true
  rcpt_include_affixes  = true
  serialize_hosts       = *
  address_retry_include_sender = false


# This variant of the hermes_lmtp transport strips out any nul bytes in order
# to avoid triggering Cyrus's strict checking. We only use it when necessary
# for efficiency reasons.

hermes_lmtp_filter:
  driver                = smtp
  protocol              = lmtp
  gethostbyname         = true
  rcpt_include_affixes  = true
  transport_filter      = /usr/bin/tr -d \\000
  serialize_hosts       = *
  address_retry_include_sender = false


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