{"id":1326,"date":"2025-11-08T00:21:26","date_gmt":"2025-11-08T00:21:26","guid":{"rendered":"https:\/\/ykim.synology.me\/wordpress\/?p=1326"},"modified":"2025-11-08T00:21:31","modified_gmt":"2025-11-08T00:21:31","slug":"conflict-bewteen-wp-mail-smtp-and-site-mailer","status":"publish","type":"post","link":"https:\/\/ykim.synology.me\/wordpress\/conflict-bewteen-wp-mail-smtp-and-site-mailer-1326\/","title":{"rendered":"Conflict bewteen WP Mail SMTP and Site Mailer"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">How to resolve this issue: &#8220;Heads up! WP Mail SMTP has detected Site Mailer &#8211; SMTP Replacement, Email API Deliverability &amp; Email Log is activated. Please deactivate Site Mailer &#8211; SMTP Replacement, Email API Deliverability &amp; Email Log to prevent conflicts.&#8221; ?<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" style=\"margin-top:var(--wp--preset--spacing--50);margin-bottom:var(--wp--preset--spacing--50)\" \/>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"128\" src=\"https:\/\/ykim.synology.me\/wordpress\/wp-content\/uploads\/2025\/11\/image-25-1024x128.png\" alt=\"\" class=\"wp-image-1327\" srcset=\"https:\/\/ykim.synology.me\/wordpress\/wp-content\/uploads\/2025\/11\/image-25-1024x128.png 1024w, https:\/\/ykim.synology.me\/wordpress\/wp-content\/uploads\/2025\/11\/image-25-300x38.png 300w, https:\/\/ykim.synology.me\/wordpress\/wp-content\/uploads\/2025\/11\/image-25-768x96.png 768w, https:\/\/ykim.synology.me\/wordpress\/wp-content\/uploads\/2025\/11\/image-25.png 1157w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This is a very common issue, and the warning message is giving you the exact solution.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here\u2019s a simple breakdown of what&#8217;s happening and how to fix it in 30 seconds.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What the Problem Is<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">You have two different plugins installed that both try to do the <strong>exact same job<\/strong>: control how your WordPress site sends email.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Plugin 1:<\/strong> WP Mail SMTP<\/li>\n\n\n\n<li><strong>Plugin 2:<\/strong> Site Mailer &#8211; SMTP Replacement\u2026<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">You can only have <strong>one<\/strong> plugin managing your email at a time. Having two active plugins &#8220;fighting&#8221; for control will cause conflicts and make your emails unreliable.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to Fix It<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">You just need to <strong>deactivate<\/strong> the other plugin (Site Mailer). WP Mail SMTP will then be able to work correctly.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>In your WordPress dashboard, go to <strong>Plugins &gt; Installed Plugins<\/strong>.<\/li>\n\n\n\n<li>Find the plugin named: <strong>&#8220;Site Mailer &#8211; SMTP Replacement, Email API Deliverability &amp; Email Log&#8221;<\/strong>.<\/li>\n\n\n\n<li>Under its name, click the <strong>&#8220;Deactivate&#8221;<\/strong> link.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">That&#8217;s it!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once you deactivate &#8220;Site Mailer,&#8221; the warning message in your WP Mail SMTP settings will disappear, and you can proceed with setting it up as your only email plugin.<\/p>\n<div style='text-align:center' class='yasr-auto-insert-overall'><\/div><div style='text-align:center' class='yasr-auto-insert-visitor'><\/div>","protected":false},"excerpt":{"rendered":"<p>How to resolve this issue: &#8220;Heads up! WP Mail SMTP has detected Site Mailer &#8211; SMTP Replacement, Email API Deliverability &amp; Email Log is activated. Please deactivate Site Mailer &#8211; SMTP Replacement, Email API Deliverability &amp; Email Log to prevent conflicts.&#8221; ? This is a very common issue, and the warning message is giving you&#8230;<\/p>\n","protected":false},"author":4,"featured_media":1327,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","yasr_overall_rating":0,"yasr_post_is_review":"","yasr_auto_insert_disabled":"","yasr_review_type":"","fifu_image_url":"","fifu_image_alt":"","iawp_total_views":0,"footnotes":""},"categories":[87],"tags":[89,88,59],"class_list":["post-1326","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-wordpress-slug","tag-email","tag-smtp","tag-wordpress"],"yasr_visitor_votes":{"stars_attributes":{"read_only":false,"span_bottom":false},"number_of_votes":0,"sum_votes":0},"jetpack_featured_media_url":"https:\/\/ykim.synology.me\/wordpress\/wp-content\/uploads\/2025\/11\/image-25.png","_links":{"self":[{"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/posts\/1326","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/comments?post=1326"}],"version-history":[{"count":1,"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/posts\/1326\/revisions"}],"predecessor-version":[{"id":1328,"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/posts\/1326\/revisions\/1328"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/media\/1327"}],"wp:attachment":[{"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/media?parent=1326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/categories?post=1326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ykim.synology.me\/wordpress\/wp-json\/wp\/v2\/tags?post=1326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}