Path: csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!news.glorb.com!solaris.cc.vt.edu!news.vt.edu!newsfeed-00.mathworks.com!panix!not-for-mail From: Grant Edwards Newsgroups: comp.os.linux.networking Subject: Re: Can I by-pass my ISP to email? Date: Sat, 13 Aug 2011 15:30:36 +0000 (UTC) Organization: PANIX Public Access Internet and UNIX, NYC Lines: 55 Message-ID: References: NNTP-Posting-Host: 68.168.167.182 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: reader1.panix.com 1313249436 3407 68.168.167.182 (13 Aug 2011 15:30:36 GMT) X-Complaints-To: abuse@panix.com NNTP-Posting-Date: Sat, 13 Aug 2011 15:30:36 +0000 (UTC) User-Agent: slrn/0.9.9p1 (Linux) Xref: x330-a1.tempe.blueboxinc.net comp.os.linux.networking:478 On 2011-08-11, NoHtmlMailsPlease wrote: > The user interface and text-handling facilities of my > LinuxETHoberon is so nice, that I hate to have to paste > the text to something like `evolution` to send it, > especially since I fetch mail by LinuxETHoberon. > > The first time my ISP introduced sendAuthorisation, > I modified my LinuxETHoberon to handle it. Then a > few years later the ISP used a different type of > sendAuthorisation. And I'm not interested to > modify my code again. The novelty had gone. > > Some one said "use sendmail or equivalent to > bypass your ISP's mail-server". > Which sounds feasible. Short answer: it isn't. Long answer: it is _if_ 1) You've got a static IP address, and 2) You set up an MX record for the address from which you're sending. 3) Nobody else at your ISP ever does something dumb and get your IP address range blacklisted. > If I've got an inet connection, I can ping any IP. > and telnet any IP. So I can talk to the recipient's > mail-server. Many/most e-mail servers will ignore mail sent from dynamic IP addresses, from IP addresses that don't belong to machines pointed to by MX records, from IP addresses in blacklisted ranges that contain a lot of 'bots, and so on. I used to use qmail (a sendmail replacement) configure to send mail directly to the destination. It stopped working consistently years and years ago because of restrictions many servers are placing on inbound mail. > Can I by-pass my ISP to email? Yes. You don't need to use your ISP, but you do need to use a "real" relay server that the rest of the world trusts. It's possible, but difficult to set one up yourself. It's easier to use Google's (though there are issues with using arbitrary "from" addresses). You could also sign up for an account with some other provider that provides e-mail service (panix.com, et.). -- Grant