{"id":341,"date":"2010-03-22T10:55:39","date_gmt":"2010-03-22T17:55:39","guid":{"rendered":"http:\/\/jim-zimmerman.com\/?p=341"},"modified":"2019-04-14T10:05:22","modified_gmt":"2019-04-14T17:05:22","slug":"test-imap-via-telnet","status":"publish","type":"post","link":"https:\/\/jim-zimmerman.com\/?p=341","title":{"rendered":"Testing email via telnet or openssl."},"content":{"rendered":"

To send an email via telnet for testing:
\ntelnet SMTP Server Name<\/em> 25
\nEHLO mydomain.tld
\nMAIL FROM: my@from.address
\nRCPT TO: my@to.address
\nDATA
\nHere you can type the body of the message.
\n.<\/p>\n

To the same thing, but with From: To: and Subject: headers:
\ntelnet SMTP Server Name<\/em> 25
\nEHLO mydomain.tld
\nMAIL FROM: my@from.address
\nRCPT TO: my@to.address
\nDATA
\nFrom: my@from.address
\nTo: my@to.address
\nSubject: Here is a subject.<\/p>\n

Here you can type the body of the message.
\n.<\/p>\n

Here is how you can do a basic test of an IMAP server via telnet:<\/p>\n

telnet IMAP Server Name<\/em> 143
\n? LOGIN username password<\/em>
\n? LIST “” “*”
\n? LOGOUT<\/p>\n

This will log you in and list the accounts mail folders. Note: This is testing a basic unencrypted login to an IMAP server. Not the way you would want to implement in production, unless implement via localhost.<\/p>\n

If you want to test your SSL configuration use openssl instead of telnet:
\nopenssl s_client -connect hostname<\/em>:portnumber<\/em><\/p>\n

For example:
\nopenssl s_client -connect SMTP Server Name<\/em>:465<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

To send an email via telnet for testing: telnet SMTP Server Name 25 EHLO mydomain.tld MAIL FROM: my@from.address RCPT TO: my@to.address DATA Here you can type the body of the message. . To the same thing, but with From: To: and Subject: headers: telnet SMTP Server Name 25 EHLO mydomain.tld MAIL FROM: my@from.address RCPT TO: [&hellip<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[67,484,161,69,68],"class_list":["post-341","post","type-post","status-publish","format-standard","hentry","category-documentation","tag-imap","tag-openssl","tag-pop","tag-telnet","tag-test"],"share_on_mastodon":{"url":"","error":""},"_links":{"self":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=341"}],"version-history":[{"count":5,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/341\/revisions"}],"predecessor-version":[{"id":1728,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=\/wp\/v2\/posts\/341\/revisions\/1728"}],"wp:attachment":[{"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jim-zimmerman.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}