About the D4_4_6_smtp_restrict_sender_4 Patch

This patch addresses the following issues:

• Rejects all messages that do not meet required conditions, specifically from designated ip address, subnet mask, domain/subdomain name, or/and hostname (MIRA-55211).
• Version 2 of this patch includes the additional three enhancements requested by the customer (MIRA-55299):
1. Allowed senders will be able to relay.
2. The senderIsValidRecipient is enforced if the user passes the restrict sender feature.
3. Exceptions for restrictsenderhost support wildcards.
• Version 3 of this patch includes the additional enhancement requested by the customer (MIRA-55299):
1. The error code is changed from 4.5.1 to 5.7.1.
• Version 4 of this patch includes these two fixes (MIRA-55299):
1. The setquery/getquery/testquery tab completion has smtp:restrictsenderhost protocol now.
2. If the user LDIF has a large number of miNetwork attributes, this feature can also work now.

1. After installing the Version 4, please use the CLI command to flush the ldap cache, "ldap flushcache "" """.
2. How to use this feature, please refer to these CLI commands for details, "help about ldap" and "help smtp set restrictsenderhost".
3. This patch reboots the appliance.
4. The patch can be removed (uninstalled).
5. Patch removal also initiates a reboot of the appliance.
6. The previous version of the patch, D4_4_6_smtp_restrict_sender, D4_4_6_smtp_restrict_sender_2, or D4_4_6_smtp_restrict_sender_3, should be removed if it exists on the system.

Installing the Patch