Prerequisites

• [ X] Put an X between the brackets on this line if you have done all of the following:
  • Read about bug reporting in general: https://rspamd.com/doc/faq.html#how-to-report-bugs-found-in-rspamd
  • Enabled relevant debugging logs: https://rspamd.com/doc/faq.html#how-to-debug-some-module-in-rspamd
  • Checked the FAQs about Core files in case of fatal crash: https://rspamd.com/doc/faq.html#how-to-figure-out-why-rspamd-process-crashed
  • Tried ASAN package and obtained the ASAN report (if possible): https://rspamd.com/doc/faq.html#asan-builds
  • Checked that your issue isn't already filed: https://github.com/issues?utf8=%E2%9C%93&q=is%3Aissue+user%3Arspamd
  • Checked that there is not already an experimental package or master branch

Describe the bug

Although documented as a possible check type for RBLs 'images' makes the RBL fail with:

invalid config for some_rbl: field "checks": array item 2: expected "emails", "replyto", "selector", "content_urls", "helo", "urls", "dkim", "rdns", "from", "received", or "numeric_urls", RBL is DISABLED

Steps to Reproduce

Configuration

some_rbl {
   ...
    checks = ['images'];
   ...
}

Will fail with

invalid config for some_rbl: field "checks\": array item 2: expected "emails", "replyto", "selector", "content_urls", "helo", "urls", "dkim", "rdns", "from", "received", or "numeric_urls", RBL is DISABLED

and not enable the RBL.

Expected behavior

Don't fail with checks = ['images'].

Versions

Rspamd daemon version 3.11.0

CPU architecture x86_64; features: avx2, avx, sse2, sse3, ssse3, sse4.1, sse4.2, rdrand
Hyperscan enabled: TRUE
Jemalloc enabled: TRUE
LuaJIT enabled: TRUE (LuaJIT version: LuaJIT 2.1.1725453128)
ASAN enabled: FALSE
BLAS enabled: FALSE
Fasttext enabled: FALSE

Additional Information

Any additional information, configuration or data that might be necessary to reproduce the issue.