diff --git a/app/api/views/new_custom_alias.py b/app/api/views/new_custom_alias.py
index 0fc3ba1a..762456a1 100644
--- a/app/api/views/new_custom_alias.py
+++ b/app/api/views/new_custom_alias.py
@@ -7,8 +7,6 @@ from app.api.base import api_bp, require_api_auth
 from app.api.serializer import (
     serialize_alias_info_v2,
     get_alias_info_v2,
-    serialize_alias_info,
-    get_alias_info,
 )
 from app.config import MAX_NB_EMAIL_FREE_PLAN, ALIAS_LIMIT
 from app.dashboard.views.custom_alias import verify_prefix_suffix, signer
@@ -27,78 +25,6 @@ from app.models import (
 from app.utils import convert_to_id
 
 
-@api_bp.route("/alias/custom/new", methods=["POST"])
-@limiter.limit(ALIAS_LIMIT)
-@require_api_auth
-def new_custom_alias():
-    """
-    Currently used by Safari extension.
-    Create a new custom alias
-    Input:
-        alias_prefix, for ex "www_groupon_com"
-        alias_suffix, either .random_letters@simplelogin.co or @my-domain.com
-        optional "hostname" in args
-        optional "note"
-    Output:
-        201 if success
-        409 if the alias already exists
-
-    """
-    LOG.w("/alias/custom/new is obsolete. User-Agent:%s", request.headers["User-Agent"])
-    user: User = g.user
-    if not user.can_create_new_alias():
-        LOG.d("user %s cannot create any custom alias", user)
-        return (
-            jsonify(
-                error="You have reached the limitation of a free account with the maximum of "
-                f"{MAX_NB_EMAIL_FREE_PLAN} aliases, please upgrade your plan to create more aliases"
-            ),
-            400,
-        )
-
-    hostname = request.args.get("hostname")
-
-    data = request.get_json()
-    if not data:
-        return jsonify(error="request body cannot be empty"), 400
-
-    alias_prefix = data.get("alias_prefix", "").strip().lower().replace(" ", "")
-    alias_suffix = data.get("alias_suffix", "").strip().lower().replace(" ", "")
-    note = data.get("note")
-    alias_prefix = convert_to_id(alias_prefix)
-
-    if not verify_prefix_suffix(user, alias_prefix, alias_suffix):
-        return jsonify(error="wrong alias prefix or suffix"), 400
-
-    full_alias = alias_prefix + alias_suffix
-    if (
-        Alias.get_by(email=full_alias)
-        or DeletedAlias.get_by(email=full_alias)
-        or DomainDeletedAlias.get_by(email=full_alias)
-    ):
-        LOG.d("full alias already used %s", full_alias)
-        return jsonify(error=f"alias {full_alias} already exists"), 409
-
-    alias = Alias.create(
-        user_id=user.id, email=full_alias, mailbox_id=user.default_mailbox_id, note=note
-    )
-
-    if alias_suffix.startswith("@"):
-        alias_domain = alias_suffix[1:]
-        domain = CustomDomain.get_by(domain=alias_domain)
-        if domain:
-            LOG.d("set alias %s to domain %s", full_alias, domain)
-            alias.custom_domain_id = domain.id
-
-    db.session.commit()
-
-    if hostname:
-        AliasUsedOn.create(alias_id=alias.id, hostname=hostname, user_id=alias.user_id)
-        db.session.commit()
-
-    return jsonify(alias=full_alias, **serialize_alias_info(get_alias_info(alias))), 201
-
-
 @api_bp.route("/v2/alias/custom/new", methods=["POST"])
 @limiter.limit(ALIAS_LIMIT)
 @require_api_auth