{"id":387,"date":"2003-07-30T11:44:11","date_gmt":"2003-07-30T09:44:11","guid":{"rendered":"http:\/\/www.multiplicity.dk\/?p=387"},"modified":"2003-07-30T11:44:11","modified_gmt":"2003-07-30T09:44:11","slug":"smtp-blues","status":"publish","type":"post","link":"https:\/\/krag.be\/index.php\/2003\/07\/30\/smtp-blues\/","title":{"rendered":"SMTP blues"},"content":{"rendered":"

I propose a web-based service that takes a shot at guessing an smtp-server that is open for the particular network you are connecting from.<\/p>\n

It would do a reverse lookup on the IP, , find the domain of the ISP you’re connecting from, and then try to ping mail.domain.com and smtp.domain.com and show me the best-bet smtp servers.<\/p>\n

Perhaps a small java-based client app that did the same, and then
\nautomatically tests whether the smtp server is open to relaying from your current machine would be even better. An app that runs on the Java MIDP profile so prevalent on smartphones and pda’s.<\/p>\n

WHY?
\n
\nWell, as some of you know already, I have a WiFi enabled Handheld computer. The one and only, wonderful Palm Tungsten C<\/a>. And owning this handheld, wireless enabled device has shown me the usefullness of free, open wireless networks. Instead of having to bring out my 3 kg dell laptop, wait 3 minutes for it to boot, and then try to connect to a network that doesn’t exist, I can whip out my palm, and be on-line in a matter of seconds, rather than dozens of minutes. <\/p>\n

I do it a lot. I check my mail, I update the weather forecast, and read up on my favourite blogs via blogstreets excellent rss2imap aggregation<\/a>. <\/p>\n

I have seen a small wink of a ubiwuitous future, and I like it. The only problem is that I can’t really send e-mail without knowing an smtp server that’s open for me. The palm seems to have some issues with POP authentication for SMTP, my server doesn’t run ESMTP, and I have little desire to set-up and monitor an open relay, even if it is on a non-standard port and completely obscure ip. <\/p>\n

I could use the palm’s built-in PPTP VPN client, but some firewalls won’t pass-through PPTP, and besides, I want a generic solution to the problem, that I can use with my laptop, smartphone or any other device.<\/p>\n

What say you?<\/p>\n","protected":false},"excerpt":{"rendered":"

I propose a web-based service that takes a shot at guessing an smtp-server that is open for the particular network you are connecting from. It would do a reverse lookup on the IP, , find the domain of the ISP you’re connecting from, and then try to ping mail.domain.com and smtp.domain.com and show me the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[4,1],"tags":[],"yoast_head":"\nSMTP blues • krag.be<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/krag.be\/index.php\/2003\/07\/30\/smtp-blues\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SMTP blues • krag.be\" \/>\n<meta property=\"og:description\" content=\"I propose a web-based service that takes a shot at guessing an smtp-server that is open for the particular network you are connecting from. 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SO Far so good. I think Palms great disadvantge wheb compared to a pocket pc or linux based handheld is that the OS is rather limited. There's no flesystem,\u2026","rel":"","context":"In "Mixed Bag"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":493,"url":"https:\/\/krag.be\/index.php\/2006\/03\/22\/the-security-challenge-of-open-wireless-networks\/","url_meta":{"origin":387,"position":1},"title":"The Security Challenge of Open Wireless Networks","date":"22\/03\/2006","format":false,"excerpt":"**Disclosure**: I am currently in the proccess of interviewing for a job with [Fon](http:\/\/fon.com\/) and this piece is largely a result of me spending time (for the first time in years) on the challenges of shared wireless in the rich countries of the west (rather than thinking mostly about the\u2026","rel":"","context":"In "ict4dev"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":505,"url":"https:\/\/krag.be\/index.php\/2006\/10\/02\/chillispot-howto\/","url_meta":{"origin":387,"position":2},"title":"Chillispot Howto","date":"02\/10\/2006","format":false,"excerpt":"I wrote this howto on setting up a hotspot system on ubuntu with user authentication about a year ago, but the site that hosted it seems to have gone down. Here's the original link: http:\/\/140.105.28.77:3455\/1\/62 And here's the text as stolen from google cache (please excuse the horrible formatting): Goal\u2026","rel":"","context":"In "Wireless"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":389,"url":"https:\/\/krag.be\/index.php\/2003\/07\/30\/2-new-categories\/","url_meta":{"origin":387,"position":3},"title":"2 new categories","date":"30\/07\/2003","format":false,"excerpt":"If you visit my front-page, and have a look at the category list on the right hand side you'll notice 2 new categories. Handhelds, is about my new Palm Tungsten C, and my experiences with handheld computers in and off the wireless networks that I work with. Look here for\u2026","rel":"","context":"In "Mixed Bag"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":371,"url":"https:\/\/krag.be\/index.php\/2003\/07\/10\/wireless-pocket-snifer\/","url_meta":{"origin":387,"position":4},"title":"Wireless pocket snifer","date":"10\/07\/2003","format":false,"excerpt":"One of the things I really like about a PDA with built-in WiFi, is that you can carry it in your pocket, and have it sniff for wireless networks. 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Blog.org attributes it to my friend Howard Rheingold: Howard Rheingold pointed out that depending on how you implement your IP network thanks to IP telephony you can get wireless telephony \"thrown\u2026","rel":"","context":"In "Wireless"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/krag.be\/index.php\/wp-json\/wp\/v2\/posts\/387"}],"collection":[{"href":"https:\/\/krag.be\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/krag.be\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/krag.be\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/krag.be\/index.php\/wp-json\/wp\/v2\/comments?post=387"}],"version-history":[{"count":0,"href":"https:\/\/krag.be\/index.php\/wp-json\/wp\/v2\/posts\/387\/revisions"}],"wp:attachment":[{"href":"https:\/\/krag.be\/index.php\/wp-json\/wp\/v2\/media?parent=387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/krag.be\/index.php\/wp-json\/wp\/v2\/categories?post=387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/krag.be\/index.php\/wp-json\/wp\/v2\/tags?post=387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}