diff --git a/bia-ingest/bia_ingest/biostudies/v4/study.py b/bia-ingest/bia_ingest/biostudies/v4/study.py
index 46889185..3ea82585 100644
--- a/bia-ingest/bia_ingest/biostudies/v4/study.py
+++ b/bia-ingest/bia_ingest/biostudies/v4/study.py
@@ -2,6 +2,8 @@
 from pydantic import ValidationError
 import re
 from typing import List, Any, Dict, Optional
+from email_validator import validate_email, EmailNotValidError
+
 from bia_ingest.cli_logging import (
     IngestionResult,
     log_failed_model_creation,
@@ -296,6 +298,7 @@ def get_contributor(
     author_sections = find_sections_recursive(submission.section, ["author"])
 
     contributor_dicts = []
+    email_warnings = []
     for section in author_sections:
 
         attributes = sanitise_affiliation_attribute(
@@ -315,20 +318,22 @@ def get_contributor(
             model_dict["affiliation"] = [
                 model_dict["affiliation"],
             ]
-        if model_dict["contact_email"] == "UNKNOWN":
-            model_dict["contact_email"] = None
-        elif model_dict["contact_email"]:
-            model_dict["contact_email"] = model_dict["contact_email"].strip("<>")
+        
+        sanitised_email, email_warnings = sanitise_contributor_email(
+            model_dict["contact_email"], email_warnings
+        )
+        model_dict["contact_email"] = sanitised_email
 
         contributor_dicts.append(model_dict)
 
+    get_unique_email_warnings(email_warnings, result_summary, submission.accno)
+
     contributors = dicts_to_api_models(
         contributor_dicts, semantic_models.Contributor, result_summary[submission.accno]
     )
 
     return contributors
 
-
 def sanitise_affiliation_attribute(
     attribute_list: List[Attribute],
     affiliation_dict: dict,
@@ -353,3 +358,31 @@ def sanitise_affiliation_attribute(
         else:
             sanitised_attribute_list.append(attribute)
     return sanitised_attribute_list
+
+def sanitise_contributor_email(
+        email: str | None, 
+        email_warnings: list
+):
+    if email is not None:
+        try:
+            email_info = validate_email(email, check_deliverability=False)
+            email = email_info.normalized
+        except EmailNotValidError as e:
+            email_warnings.append(str(e))
+            email = None
+    
+    return [email, email_warnings]
+
+def get_unique_email_warnings(
+        email_warnings: list,
+        result_summary: dict[str, IngestionResult],
+        accno: str
+):
+    if email_warnings != []:
+        unique_warnings = list(set(email_warnings))
+        for warning in unique_warnings:
+            result_summary[accno].__setattr__(
+                "Warning",
+                "Skipped invalid author email: " + str(warning) + "\n"
+            )
+            logger.warning(f"Skipped invalid author email: {warning}")
diff --git a/bia-ingest/bia_ingest/cli_logging.py b/bia-ingest/bia_ingest/cli_logging.py
index b3df87ea..2bb22a3b 100644
--- a/bia-ingest/bia_ingest/cli_logging.py
+++ b/bia-ingest/bia_ingest/cli_logging.py
@@ -71,6 +71,7 @@ class IngestionResult(CLIResult):
     ImageCorrelationMethod_ValidationErrorCount: int = Field(default=0)
 
     Uncaught_Exception: str = Field(default="")
+    Warning: str = Field(default="")
 
 
 def tabulate_ingestion_errors(
@@ -78,7 +79,7 @@ def tabulate_ingestion_errors(
 ) -> Table:
 
     table = Table()
-    headers = ["Accession ID", "Processing Mode", "Status", "Error: Count;"]
+    headers = ["Accession ID", "Processing Mode", "Status", "Error: Count", "Warnings"]
 
     if include_object_count:
         for field in IngestionResult.model_fields:
@@ -118,20 +119,36 @@ def tabulate_ingestion_errors(
 
         if result.Uncaught_Exception:
             error_message += f"Uncaught exception: {result.Uncaught_Exception}"
-
-        if error_message == "":
+        
+        warning_message = ""
+        if result.Warning:
+            warning_message = result.Warning
+        
+        if (error_message == "") & (warning_message == ""):
             status = Text("Success")
             status.stylize("green")
-        else:
+        elif (error_message == "") & (warning_message != ""):
+            status = Text("Success with warnings")
+            status.stylize("yellow")
+            warning_message = Text(warning_message)
+            warning_message.stylize("yellow")
+        elif (error_message != "") & (warning_message != ""):
+            status = Text("Failures with warnings")
+            status.stylize("red")
+            warning_message = Text(warning_message)
+            warning_message.stylize("yellow")
+            error_message = Text(error_message)
+            error_message.stylize("red")
+        elif (error_message != "") & (warning_message == ""):
             status = Text("Failures")
             status.stylize("red")
             error_message = Text(error_message)
             error_message.stylize("red")
 
-        row_info = [accession_id_key, result.ProcessingVersion, status, error_message]
+        row_info = [accession_id_key, result.ProcessingVersion, status, error_message, warning_message]
 
         if include_object_count:
-            for header in headers[4:]:
+            for header in headers[5:]:
                 row_info.append(str(result_dict[header + "_CreationCount"]))
 
         table.add_row(*row_info)