ns_server should be able to send emails on all supported kinds of poor man's alerts

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: None
• Affects Version/s: None
• Component/s: ns_server
• Security Level: Public
• Labels:

  None

For Gerrit Dashboard: MB-6131
#	Subject	Branch	Project	Status	CR	V
19740,1	MB-6131 Make message on failure to sent email more user friendly.	master	ns_server	Status: MERGED	+2	+1
19741,1	MB-6131 ns_mail is not a gen_server anymore.	master	ns_server	Status: MERGED	+2	+1
19742,2	MB-6131 Move email helpers from ns_mail_log to ns_mail.	master	ns_server	Status: MERGED	+2	+1
19743,1	MB-6131 Fix gen_smtp_client:send when callback is not undefined.	master	ns_server	Status: MERGED	+2	+1
19744,2	MB-6131 Send out email alerts asynchronously.	master	ns_server	Status: MERGED	+2	+1
19746,2	MB-6131 Allow sending web alerts via email.	master	ns_server	Status: MERGED	+2	+1
19901,1	MB-6131: enabled emails for all alerts by default	master	ns_server	Status: MERGED	+2	+1
93850,4	Reapply the following patches after upgrading of gen_smtp:	master	ns_server	Status: MERGED	+2	+1