{"id":19015355,"date":"2026-09-09T10:07:34","date_gmt":"2026-09-09T10:07:34","guid":{"rendered":"https:\/\/wordpress.org\/support\/topic\/cant-set-up-plain-smtp-without-credentials\/"},"modified":"2026-09-09T10:07:34","modified_gmt":"2026-09-09T10:07:34","slug":"cant-set-up-plain-smtp-without-credentials","status":"publish","type":"topic","link":"https:\/\/wordpress.org\/support\/topic\/cant-set-up-plain-smtp-without-credentials\/","title":{"rendered":"Can&#8217;t set up plain SMTP without credentials"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">I couldn&#8217;t set up this plugin with my corporate SMTP server, which authenticates by IP address and doesn&#8217;t require entering a username or password. Even though I&#8217;ve unchecked the option for using credentials, when I try to save the configuration, it fails with a red message stating that &#8220;credentials were entered incorrectly.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I switched to another SMTP plugin, and it worked without issues, so I believe something isn&#8217;t working correctly in this scenario.<\/p>\n","protected":false},"template":"","class_list":["post-19015355","topic","type-topic","status-publish","hentry","topic-tag-credentials"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19015355","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19015355\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/media?parent=19015355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}