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

User agent: Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.7922.173 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

Headers of https://mailchi.mp/firstchurchboston/officefirstchurchbostonorg-14571424:
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Content-Location: https://us7.campaign-archive.com/?u=2f3234fc94ecc4df09a638f3f&id=d9f1a13ebd
x-code-owner: 871464121225367182
x-code-owner-github-team: @mailchimp-monolith/multi-channel
x-envoy-upstream-service-time: 746
x-mc-customer-tier: pro
x-ua-compatible: IE=edge,chrome=1
x-debug-metrics: 0.0060, 0.000, -, 200, 0.743
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: 1-6a9df544-7e3b28df46be47ad44728fd4
x-intuit-upstream-locality-region: us-east-2
strict-transport-security: max-age=15552000
x-spanid: 342650fb-c978-4abc-3a0d-4598d4ea19c4
x-amzn-trace-id: Root=1-6a9df544-7e3b28df46be47ad44728fd4
x-content-type-options: nosniff
intuit_tid: 1-6a9df544-7e3b28df46be47ad44728fd4
Date: Sun, 06 Sep 2026 23:20:37 GMT
Connection: keep-alive
Set-Cookie: _mcid=1.5b71268244cf5a5e013c069d01d07e71.c815f8d3a28eae627d1c3f76c193805dde93e4724ff87e6aadb2e6275631271c; expires=Mon, 06 Sep 2027 23:20:36 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: 0.14192117.1788736836.47293444

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.