Sorry for taking to long to get back to this bug.

>From the haproxy documentation 
>(http://cbonte.github.io/haproxy-dconv/1.6/configuration.html#4.2-email-alert%20level):
"""
Alerts are sent when :

* An un-paused server is marked as down and <level> is alert or lower
* A paused server is marked as down and <level> is notice or lower
* A server is marked as up or enters the drain state and <level>
  is notice or lower
* "option log-health-checks" is enabled, <level> is info or lower,
   and a health check status update occurs
"""

Notice how "server up" uses a different alert threshold: "notice or
lower", whereas the "down" event uses "alert or lower". The default
threshold is "alert".

Anyway, with this config I got an email in the "up" event:
        email-alert mailers mymta
        email-alert from haproxy@lxd
        email-alert to ubuntu@lxd
        email-alert level notice

Without the "email-alert level notice" line, I only got the email when
the server is down.

It seems to match the documentation at least.

I used haproxy 1.6.3-1ubuntu0.1 in xenial.


** Changed in: haproxy (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1582708

Title:
  HAproxy 1.6.3 mail alerts on DOWN but not UP

Status in haproxy package in Ubuntu:
  Incomplete

Bug description:
  This has plagued since I upgraded to Xenial beta and HAProxy 1.6.x
  (latest is .3).  For some reason, HAProxy will mail alerts when the
  state changes to DOWN, but not when the state changes back to UP. I
  get mails for DOWN, so the mailer settings are correct, so this must
  be something in HAProxy that's not quite right.

  This is on a fully updated Xenial

  Kernel: 4.4.0-22-generic
  Description:    Ubuntu 16.04 LTS
  Release:        16.04

  
  DOWN Alert:
  May 16 15:52:44 caesar haproxy[957]: Server lc-db-cluster/qa-db is DOWN, 
reason: Layer7 wrong status, code: 503, info: "Service Unavailable", check 
duration: 9ms. 1 active and 0 backup servers left. 0 sessions active, 0 
requeued, 0 remaining in queue.

  DOWN Mail:
  May 16 15:52:45 caesar postfix/smtp[1366]: 9D5CC1E0419: 
to=<[email protected]>, relay=smtp.sendgrid.net[167.89.121.145]:587, 
delay=0.94, delays=0.08/0.03/0.67/0.16, dsn=2.0.0, status=sent (250 Ok: queued 
as ab6lg_ZkT6arW6MD-zLMlw)

  UP Alert:
  May 16 15:55:32 caesar haproxy[957]: Server lc-db-cluster/qa-db is UP, 
reason: Layer7 check passed, code: 200, info: "OK", check duration: 9ms. 2 
active and 0 backup servers online. 0 sessions requeued, 0 total in queue.

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