{"id":9048,"date":"2021-04-24T19:03:18","date_gmt":"2021-04-24T16:03:18","guid":{"rendered":"https:\/\/www.aso.com.tr\/smtp-port-587-465-settings\/"},"modified":"2026-10-23T21:16:13","modified_gmt":"2026-10-23T18:16:13","slug":"smtp-port-587-465-settings","status":"publish","type":"post","link":"https:\/\/www.aso.com.tr\/en\/smtp-port-587-465-settings\/","title":{"rendered":"SMTP Port 587 vs 465: Current Outgoing Mail Settings"},"content":{"rendered":"
Current outgoing mail (SMTP) settings:<\/strong> server smaug.aso.com.tr<\/strong>, port 465<\/strong>, SSL\/TLS<\/strong>, username = full e-mail address, \u201coutgoing server requires authentication\u201d on. Do not use port 25<\/strong> in mail clients \u2013 ISPs block it.<\/div>\n
\n\n\n\n\n\n\n\n
Setting<\/th>\nRecommended (encrypted)<\/th>\nLegacy<\/th>\n<\/tr>\n<\/thead>\n
IMAP<\/td>\nsmaug.aso.com.tr \u00b7 993 \u00b7 SSL\/TLS<\/td>\nmail.yourdomain.com \u00b7 143<\/td>\n<\/tr>\n
POP3<\/td>\nsmaug.aso.com.tr \u00b7 995 \u00b7 SSL\/TLS<\/td>\nmail.yourdomain.com \u00b7 110<\/td>\n<\/tr>\n
SMTP<\/td>\nsmaug.aso.com.tr \u00b7 465 \u00b7 SSL\/TLS<\/td>\nmail.yourdomain.com \u00b7 587<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n\n\n\n\n\n\n\n
Port<\/th>\nUse<\/th>\n<\/tr>\n<\/thead>\n
25<\/td>\nServer-to-server relay; blocked by ISPs for clients<\/td>\n<\/tr>\n
587<\/td>\nSubmission with authentication, usually STARTTLS<\/td>\n<\/tr>\n
465<\/td>\nSubmission over implicit SSL\/TLS (recommended)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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Frequently asked questions<\/h2>\n

Which SMTP port should I use?<\/h3>\n

465 with SSL\/TLS (recommended) or 587 with authentication; never 25 in a mail client.<\/p>\n

What is the difference between 587 and 465?<\/h3>\n

465 is encrypted from the start; 587 upgrades with STARTTLS. Both require authentication.<\/p>\n