diff --git a/erpnext/crm/doctype/lead/lead.json b/erpnext/crm/doctype/lead/lead.json
index bc007b1..bd3110b 100644
--- a/erpnext/crm/doctype/lead/lead.json
+++ b/erpnext/crm/doctype/lead/lead.json
@@ -6,6 +6,7 @@
  "creation": "2013-04-10 11:45:37",
  "doctype": "DocType",
  "document_type": "Document",
+ "email_append_to": 1,
  "engine": "InnoDB",
  "field_order": [
   "organization_lead",
@@ -439,7 +440,7 @@
  "idx": 5,
  "image_field": "image",
  "links": [],
- "modified": "2019-12-24 16:00:44.239168",
+ "modified": "2020-01-13 16:16:48.885228",
  "modified_by": "Administrator",
  "module": "CRM",
  "name": "Lead",
@@ -508,6 +509,7 @@
   }
  ],
  "search_fields": "lead_name,lead_owner,status",
+ "sender_field": "email_id",
  "show_name_in_global_search": 1,
  "sort_field": "modified",
  "sort_order": "DESC",
diff --git a/erpnext/crm/doctype/lead/lead.py b/erpnext/crm/doctype/lead/lead.py
index 73ef79b..fff7b8f 100644
--- a/erpnext/crm/doctype/lead/lead.py
+++ b/erpnext/crm/doctype/lead/lead.py
@@ -12,9 +12,6 @@
 from frappe.model.mapper import get_mapped_doc
 from frappe.utils import cint, comma_and, cstr, getdate, has_gravatar, nowdate, validate_email_address
 
-sender_field = "email_id"
-
-
 class Lead(SellingController):
 	def get_feed(self):
 		return '{0}: {1}'.format(_(self.status), self.lead_name)
diff --git a/erpnext/crm/doctype/opportunity/opportunity.json b/erpnext/crm/doctype/opportunity/opportunity.json
index 0e2068a..93814c6 100644
--- a/erpnext/crm/doctype/opportunity/opportunity.json
+++ b/erpnext/crm/doctype/opportunity/opportunity.json
@@ -1,4 +1,5 @@
 {
+ "actions": [],
  "allow_import": 1,
  "allow_rename": 1,
  "autoname": "naming_series:",
@@ -7,6 +8,7 @@
  "doctype": "DocType",
  "document_type": "Document",
  "editable_grid": 1,
+ "email_append_to": 1,
  "engine": "InnoDB",
  "field_order": [
   "from_section",
@@ -326,6 +328,7 @@
    "fieldname": "contact_email",
    "fieldtype": "Data",
    "label": "Contact Email",
+   "options": "Email",
    "read_only": 1
   },
   {
@@ -418,7 +421,8 @@
  ],
  "icon": "fa fa-info-sign",
  "idx": 195,
- "modified": "2019-09-30 12:58:37.385400",
+ "links": [],
+ "modified": "2020-01-13 16:18:44.477818",
  "modified_by": "Administrator",
  "module": "CRM",
  "name": "Opportunity",
@@ -450,9 +454,11 @@
   }
  ],
  "search_fields": "status,transaction_date,party_name,opportunity_type,territory,company",
+ "sender_field": "contact_email",
  "show_name_in_global_search": 1,
  "sort_field": "modified",
  "sort_order": "DESC",
+ "subject_field": "title",
  "timeline_field": "party_name",
  "title_field": "title",
  "track_seen": 1,
diff --git a/erpnext/crm/doctype/opportunity/opportunity.py b/erpnext/crm/doctype/opportunity/opportunity.py
index 5911db9..5e640e7 100644
--- a/erpnext/crm/doctype/opportunity/opportunity.py
+++ b/erpnext/crm/doctype/opportunity/opportunity.py
@@ -11,9 +11,6 @@
 from erpnext.accounts.party import get_party_account_currency
 from frappe.email.inbox import link_communication_to_document
 
-subject_field = "title"
-sender_field = "contact_email"
-
 class Opportunity(TransactionBase):
 	def after_insert(self):
 		if self.opportunity_from == "Lead":
diff --git a/erpnext/hooks.py b/erpnext/hooks.py
index 54f1a1e..b2dc961 100644
--- a/erpnext/hooks.py
+++ b/erpnext/hooks.py
@@ -55,12 +55,8 @@
 update_website_context = ["erpnext.shopping_cart.utils.update_website_context", "erpnext.education.doctype.education_settings.education_settings.update_website_context"]
 my_account_context = "erpnext.shopping_cart.utils.update_my_account_context"
 
-email_append_to = ["Job Applicant", "Lead", "Opportunity", "Issue"]
-
 calendars = ["Task", "Work Order", "Leave Application", "Sales Order", "Holiday List", "Course Schedule"]
 
-
-
 domains = {
 	'Agriculture': 'erpnext.domains.agriculture',
 	'Distribution': 'erpnext.domains.distribution',
diff --git a/erpnext/hr/doctype/job_applicant/job_applicant.json b/erpnext/hr/doctype/job_applicant/job_applicant.json
index b0cddc2..c13548a 100644
--- a/erpnext/hr/doctype/job_applicant/job_applicant.json
+++ b/erpnext/hr/doctype/job_applicant/job_applicant.json
@@ -1,385 +1,123 @@
 {
- "allow_copy": 0, 
- "allow_guest_to_view": 0, 
- "allow_import": 0, 
- "allow_rename": 1, 
- "autoname": "HR-APP-.YYYY.-.#####", 
- "beta": 0, 
- "creation": "2013-01-29 19:25:37", 
- "custom": 0, 
- "description": "Applicant for a Job", 
- "docstatus": 0, 
- "doctype": "DocType", 
- "document_type": "Document", 
- "editable_grid": 0, 
- "engine": "InnoDB", 
+ "actions": [],
+ "allow_rename": 1,
+ "autoname": "HR-APP-.YYYY.-.#####",
+ "creation": "2013-01-29 19:25:37",
+ "description": "Applicant for a Job",
+ "doctype": "DocType",
+ "document_type": "Document",
+ "email_append_to": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "applicant_name",
+  "email_id",
+  "status",
+  "column_break_3",
+  "job_title",
+  "source",
+  "source_name",
+  "section_break_6",
+  "notes",
+  "cover_letter",
+  "resume_attachment"
+ ],
  "fields": [
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 1, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "applicant_name", 
-   "fieldtype": "Data", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 1, 
-   "in_list_view": 0, 
-   "in_standard_filter": 0, 
-   "label": "Applicant Name", 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 1, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "bold": 1,
+   "fieldname": "applicant_name",
+   "fieldtype": "Data",
+   "in_global_search": 1,
+   "label": "Applicant Name",
+   "reqd": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 1, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "email_id", 
-   "fieldtype": "Data", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 0, 
-   "in_standard_filter": 0, 
-   "label": "Email Address", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Email", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 1, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "bold": 1,
+   "fieldname": "email_id",
+   "fieldtype": "Data",
+   "label": "Email Address",
+   "options": "Email",
+   "reqd": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "status", 
-   "fieldtype": "Select", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 1, 
-   "in_standard_filter": 1, 
-   "label": "Status", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Open\nReplied\nRejected\nHold\nAccepted", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 1, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "status",
+   "fieldtype": "Select",
+   "in_list_view": 1,
+   "in_standard_filter": 1,
+   "label": "Status",
+   "options": "Open\nReplied\nRejected\nHold\nAccepted",
+   "reqd": 1
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "column_break_3", 
-   "fieldtype": "Column Break", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 0, 
-   "in_standard_filter": 0, 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0, 
+   "fieldname": "column_break_3",
+   "fieldtype": "Column Break",
    "width": "50%"
-  }, 
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "job_title", 
-   "fieldtype": "Link", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 1, 
-   "in_standard_filter": 0, 
-   "label": "Job Opening", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Job Opening", 
-   "permlevel": 0, 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "job_title",
+   "fieldtype": "Link",
+   "in_list_view": 1,
+   "label": "Job Opening",
+   "options": "Job Opening"
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "source", 
-   "fieldtype": "Link", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 0, 
-   "in_standard_filter": 0, 
-   "label": "Source", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Job Applicant Source", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "source",
+   "fieldtype": "Link",
+   "label": "Source",
+   "options": "Job Applicant Source"
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "depends_on": "eval: doc.source==\"Employee Referral\" ", 
-   "fieldname": "source_name", 
-   "fieldtype": "Link", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 0, 
-   "in_standard_filter": 0, 
-   "label": "Source Name", 
-   "length": 0, 
-   "no_copy": 0, 
-   "options": "Employee", 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "depends_on": "eval: doc.source==\"Employee Referral\" ",
+   "fieldname": "source_name",
+   "fieldtype": "Link",
+   "label": "Source Name",
+   "options": "Employee"
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "section_break_6", 
-   "fieldtype": "Section Break", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 0, 
-   "in_standard_filter": 0, 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "section_break_6",
+   "fieldtype": "Section Break"
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "cover_letter", 
-   "fieldtype": "Text", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 0, 
-   "in_standard_filter": 0, 
-   "label": "Cover Letter", 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
-  }, 
+   "fieldname": "cover_letter",
+   "fieldtype": "Text",
+   "label": "Cover Letter"
+  },
   {
-   "allow_bulk_edit": 0, 
-   "allow_in_quick_entry": 0, 
-   "allow_on_submit": 0, 
-   "bold": 0, 
-   "collapsible": 0, 
-   "columns": 0, 
-   "fieldname": "resume_attachment", 
-   "fieldtype": "Attach", 
-   "hidden": 0, 
-   "ignore_user_permissions": 0, 
-   "ignore_xss_filter": 0, 
-   "in_filter": 0, 
-   "in_global_search": 0, 
-   "in_list_view": 0, 
-   "in_standard_filter": 0, 
-   "label": "Resume Attachment", 
-   "length": 0, 
-   "no_copy": 0, 
-   "permlevel": 0, 
-   "precision": "", 
-   "print_hide": 0, 
-   "print_hide_if_no_value": 0, 
-   "read_only": 0, 
-   "remember_last_selected_value": 0, 
-   "report_hide": 0, 
-   "reqd": 0, 
-   "search_index": 0, 
-   "set_only_once": 0, 
-   "translatable": 0, 
-   "unique": 0
+   "fieldname": "resume_attachment",
+   "fieldtype": "Attach",
+   "label": "Resume Attachment"
+  },
+  {
+   "fieldname": "notes",
+   "fieldtype": "Data",
+   "label": "Notes",
+   "read_only": 1
   }
- ], 
- "has_web_view": 0, 
- "hide_heading": 0, 
- "hide_toolbar": 0, 
- "icon": "fa fa-user", 
- "idx": 1, 
- "image_view": 0, 
- "in_create": 0, 
- "is_submittable": 0, 
- "issingle": 0, 
- "istable": 0, 
- "max_attachments": 0, 
- "modified": "2019-07-21 16:15:43.552049", 
- "modified_by": "Administrator", 
- "module": "HR", 
- "name": "Job Applicant", 
- "owner": "Administrator", 
+ ],
+ "icon": "fa fa-user",
+ "idx": 1,
+ "links": [],
+ "modified": "2020-01-13 16:19:39.113330",
+ "modified_by": "Administrator",
+ "module": "HR",
+ "name": "Job Applicant",
+ "owner": "Administrator",
  "permissions": [
   {
-   "amend": 0, 
-   "cancel": 0, 
-   "create": 1, 
-   "delete": 1, 
-   "email": 1, 
-   "export": 0, 
-   "if_owner": 0, 
-   "import": 0, 
-   "permlevel": 0, 
-   "print": 1, 
-   "read": 1, 
-   "report": 1, 
-   "role": "HR User", 
-   "set_user_permissions": 0, 
-   "share": 1, 
-   "submit": 0, 
+   "create": 1,
+   "delete": 1,
+   "email": 1,
+   "print": 1,
+   "read": 1,
+   "report": 1,
+   "role": "HR User",
+   "share": 1,
    "write": 1
   }
- ], 
- "quick_entry": 0, 
- "read_only": 0, 
- "read_only_onload": 0, 
- "search_fields": "applicant_name", 
- "show_name_in_global_search": 0, 
- "sort_order": "ASC", 
- "title_field": "applicant_name", 
- "track_changes": 0, 
- "track_seen": 0, 
- "track_views": 0
+ ],
+ "search_fields": "applicant_name",
+ "sender_field": "email_id",
+ "sort_field": "modified",
+ "sort_order": "ASC",
+ "subject_field": "notes",
+ "title_field": "applicant_name"
 }
\ No newline at end of file
diff --git a/erpnext/hr/doctype/job_applicant/job_applicant.py b/erpnext/hr/doctype/job_applicant/job_applicant.py
index 4fc7719..a6aef04 100644
--- a/erpnext/hr/doctype/job_applicant/job_applicant.py
+++ b/erpnext/hr/doctype/job_applicant/job_applicant.py
@@ -9,8 +9,6 @@
 from frappe import _
 from frappe.utils import comma_and, validate_email_address
 
-sender_field = "email_id"
-
 class DuplicationError(frappe.ValidationError): pass
 
 class JobApplicant(Document):
diff --git a/erpnext/support/doctype/issue/issue.json b/erpnext/support/doctype/issue/issue.json
index 6641f56..c12cef4 100644
--- a/erpnext/support/doctype/issue/issue.json
+++ b/erpnext/support/doctype/issue/issue.json
@@ -6,6 +6,7 @@
  "creation": "2013-02-01 10:36:25",
  "doctype": "DocType",
  "document_type": "Setup",
+ "email_append_to": 1,
  "engine": "InnoDB",
  "field_order": [
   "subject_section",
@@ -366,7 +367,7 @@
  "icon": "fa fa-ticket",
  "idx": 7,
  "links": [],
- "modified": "2020-02-26 02:19:49.477928",
+ "modified": "2020-03-13 02:19:49.477928",
  "modified_by": "Administrator",
  "module": "Support",
  "name": "Issue",
@@ -386,8 +387,10 @@
  ],
  "quick_entry": 1,
  "search_fields": "status,customer,subject,raised_by",
+ "sender_field": "raised_by",
  "sort_field": "modified",
  "sort_order": "DESC",
+ "subject_field": "subject",
  "timeline_field": "customer",
  "title_field": "subject",
  "track_changes": 1,
diff --git a/erpnext/support/doctype/issue/issue.py b/erpnext/support/doctype/issue/issue.py
index 1ca6de4..fd72807 100644
--- a/erpnext/support/doctype/issue/issue.py
+++ b/erpnext/support/doctype/issue/issue.py
@@ -14,9 +14,6 @@
 from erpnext.support.doctype.service_level_agreement.service_level_agreement import get_active_service_level_agreement_for
 from frappe.email.inbox import link_communication_to_document
 
-sender_field = "raised_by"
-
-
 class Issue(Document):
 	def get_feed(self):
 		return "{0}: {1}".format(_(self.status), self.subject)
diff --git a/erpnext/www/book-appointment/__init__.py b/erpnext/www/book-appointment/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/erpnext/www/book-appointment/__init__.py
diff --git a/erpnext/www/book-appointment/verify/__init__.py b/erpnext/www/book-appointment/verify/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/erpnext/www/book-appointment/verify/__init__.py