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API Reference
Email Security
Settings
Block Senders

Update a blocked email sender

email_security.settings.block_senders.edit(strpattern_id, BlockSenderEditParams**kwargs) -> BlockSenderEditResponse
PATCH/accounts/{account_id}/email-security/settings/block_senders/{pattern_id}

Updates an existing blocked sender pattern. Only provided fields will be modified. The pattern will continue blocking emails until deleted.

Security
API Token

The preferred authorization scheme for interacting with the Cloudflare API. Create a token.

Example:Authorization: Bearer Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY
API Email + API Key

The previous authorization scheme for interacting with the Cloudflare API, used in conjunction with a Global API key.

Example:X-Auth-Email: user@example.com

The previous authorization scheme for interacting with the Cloudflare API. When possible, use API tokens instead of Global API keys.

Example:X-Auth-Key: 144c9defac04969c7bfad8efaa8ea194
Accepted Permissions (at least one required)
Cloud Email Security: Write
ParametersExpand Collapse
account_id: str

Identifier.

maxLength32
pattern_id: str

Blocked sender pattern identifier.

formatuuid
comments: Optional[str]
maxLength1024
is_regex: Optional[bool]
pattern: Optional[str]

The pattern value to match. The format depends on pattern_type: a valid email address for EMAIL (e.g. user@example.com), a valid domain name for DOMAIN (e.g. example.com), or a plain IPv4 address or IPv4 CIDR block for IP (e.g. 1.2.3.4 or 1.2.3.0/24); the API accepts only globally reachable IP addresses and rejects private, loopback, link-local, and unspecified addresses.

maxLength1024
minLength1
pattern_type: Optional[Literal["EMAIL", "DOMAIN", "IP", "UNKNOWN"]]

Type of pattern matching.

  • EMAIL: matches a full email address (e.g. user@example.com)
  • DOMAIN: matches a domain name (e.g. example.com)
  • IP: matches a plain IPv4 address (e.g. 1.2.3.4) or an IPv4 CIDR block (e.g. 1.2.3.0/24). The API accepts only globally reachable addresses.
  • UNKNOWN: deprecated; you cannot use this when creating or updating policies, but it may appear on existing entries.
One of the following:
"EMAIL"
"DOMAIN"
"IP"
"UNKNOWN"
ReturnsExpand Collapse
class BlockSenderEditResponse: …

A blocked sender pattern.

id: Optional[str]

Blocked sender pattern identifier.

formatuuid
comments: Optional[str]
maxLength1024
created_at: Optional[datetime]
formatdate-time
is_regex: Optional[bool]
Deprecatedlast_modified: Optional[datetime]

Use modified_at instead.

Deprecated, use modified_at instead. End of life: November 1, 2026.

formatdate-time
modified_at: Optional[datetime]
formatdate-time
pattern: Optional[str]

The pattern value to match. The format depends on pattern_type: a valid email address for EMAIL (e.g. user@example.com), a valid domain name for DOMAIN (e.g. example.com), or a plain IPv4 address or IPv4 CIDR block for IP (e.g. 1.2.3.4 or 1.2.3.0/24); the API accepts only globally reachable IP addresses and rejects private, loopback, link-local, and unspecified addresses.

maxLength1024
minLength1
pattern_type: Optional[Literal["EMAIL", "DOMAIN", "IP", "UNKNOWN"]]

Type of pattern matching.

  • EMAIL: matches a full email address (e.g. user@example.com)
  • DOMAIN: matches a domain name (e.g. example.com)
  • IP: matches a plain IPv4 address (e.g. 1.2.3.4) or an IPv4 CIDR block (e.g. 1.2.3.0/24). The API accepts only globally reachable addresses.
  • UNKNOWN: deprecated; you cannot use this when creating or updating policies, but it may appear on existing entries.
One of the following:
"EMAIL"
"DOMAIN"
"IP"
"UNKNOWN"

Update a blocked email sender

import os
from cloudflare import Cloudflare

client = Cloudflare(
    api_token=os.environ.get("CLOUDFLARE_API_TOKEN"),  # This is the default and can be omitted
)
response = client.email_security.settings.block_senders.edit(
    pattern_id="f174e90a-fafe-4643-bbbc-4a0ed4fc8415",
    account_id="023e105f4ecef8ad9ca31a8372d0c353",
)
print(response.id)
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "success": true,
  "result": {
    "id": "f174e90a-fafe-4643-bbbc-4a0ed4fc8415",
    "comments": "Block sender with email test@example.com",
    "created_at": "2014-01-01T05:20:00.12345Z",
    "is_regex": false,
    "last_modified": "2014-01-01T05:20:00.12345Z",
    "modified_at": "2014-01-01T05:20:00.12345Z",
    "pattern": "test@example.com",
    "pattern_type": "EMAIL"
  }
}
Returns Examples
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "success": true,
  "result": {
    "id": "f174e90a-fafe-4643-bbbc-4a0ed4fc8415",
    "comments": "Block sender with email test@example.com",
    "created_at": "2014-01-01T05:20:00.12345Z",
    "is_regex": false,
    "last_modified": "2014-01-01T05:20:00.12345Z",
    "modified_at": "2014-01-01T05:20:00.12345Z",
    "pattern": "test@example.com",
    "pattern_type": "EMAIL"
  }
}