Checkrrvs, ignorerrvs Channel Options

Recipient validity date check
The  and   source channel options, for support of  RFC 7293, are new in MS 8.0. is the default.

means that the SMTP server will not offer or support the RRVS SMTP extension. In particular, client attempts to use an RRVS parameter in a RCPT TO command will cause an error, and the MTA will ignore any Require-Recipient-Valid-Since: header line.

when set on an SMTP source channel means that the SMTP server offers and supports  use of the SMTP RRVS extension. In particular, the MTA will check for a valid date for recipient mailbox ownership, whether specified (preferentially) in a RRVS parameter in the RCPT TO command, or in a Require-Recipient-Valid-Since: header field, and check for a valid date for the domain in the recipient address.

If the  check fails on the recipient mailbox address, the  recipient will be rejected with the SMTP error: 550 5.7.15 account information on file is older than actual user account or alternate text as controlled by the  MTA option; if the   check fails due to the domain creation date, the recipient will be rejected with the SMTP error: 550 5.7.18 domain owner has changed or alternate text as controlled by the  MTA option.

See also:
 * ldap_creation_date MTA Option
 * ldap_domain_attr_creation_date MTA Option
 * alias_creation_date Option
 * Alias file named parameters
 * error_text_wrong_account MTA Option
 * error_text_wrong_domain MTA Option
 * Addresses channel options
 * SMTP and LMTP protocol channel options
 * Channel options