Advanced iframe debug console – l: local messages, r: remote messages

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/605.1.15

Headers of https://mailchi.mp/firstchurchboston/officefirstchurchbostonorg-14571723:
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Content-Location: https://us7.campaign-archive.com/?u=2f3234fc94ecc4df09a638f3f&id=4a1c14c38c
x-code-owner: 871464121225367182
x-code-owner-github-team: @mailchimp-monolith/multi-channel
x-envoy-upstream-service-time: 723
x-mc-customer-tier: pro
x-ua-compatible: IE=edge,chrome=1
x-debug-metrics: 0.0070, 0.000, -, 200, 0.720
Server: istio-envoy
x-envoy-decorator-operation: mc-request-mapper-proxy-desired-service.mc-lps-mcrequestmapperproxy-use2-prd.svc.cluster.local:8090/*
x-request-id: 1-6ab87778-5ad39abd19b2ff9f068a74b9
x-intuit-upstream-locality-region: us-east-2
intuit_tid: 1-6ab87778-5ad39abd19b2ff9f068a74b9
strict-transport-security: max-age=15552000
x-spanid: 70d2b839-bd47-cb27-f3c5-e8023a018602
x-amzn-trace-id: Root=1-6ab87778-5ad39abd19b2ff9f068a74b9
x-content-type-options: nosniff
Date: Sun, 27 Sep 2026 01:55:05 GMT
Connection: keep-alive
Set-Cookie: _mcid=1.ad9c8e57a8e9a149e11d2af1db2f4d9f.3ad4a5a815502deee17f3dbe000c37037e2d7e9af20fad0e72297f14d584d7a5; expires=Mon, 27 Sep 2027 01:55:04 GMT; Max-Age=31536000; path=/
Set-Cookie: _mc_anon_id=deleted; expires=Thu, 01 Jan 1970 00:00:01 GMT; Max-Age=0; path=/
Akamai-GRN: 0.14192117.1790474104.66788cf3

The page does exist and no X-Frame-Options header was found. But there can still be a iframe blocker script on this page. Go here for a full check.