Hello PLUGgers, On Wed, 28 Apr 2004, Manny Amador wrote: > > Is there a way for an ISP to block mail being sent through the localhost > > SMTP? > > > > I have one RH 9 Linux box in Cebu where I use pine to send mail. The SMTP > > servier is set to localhost. I run postifx. It works fine when sending > > email through Mozcom and another satellite office's dialup (they have a > > DSL line to connect to the internet and we dialup to them for internet > > connection). > >
I'm currently using Blast (http://www.blast.ph) as my ISP here in Daet. I've done some research (host blast.ph, nmap 202.78.97.0/24) and I found out that this is actually a subnet of skyinet.net (like I didn't see on the card that it is ;-) I used to have Exim configured to use a smarthost (mail.skyinet.net) and it works; but now I prefer to have a direct SMTP setup (since I like to learn, and I like my dynDNS)... and yes, it still works, and I haven't received any reports about my mail not getting anywhere (esp. when it's due to a mailing list, like plug or debian-mentors ;-) On Wed, Apr 28, 2004 at 01:22:02PM +0800, ian sison (mailing list) wrote: > Most ISPs that know what they are doing WILL BLOCK direct SMTP from dialup > connections. This is to prevent spammers from directly broadcasting spam > off their dialup connections. If you come across an ISP which doesn't > block direct SMTP, then beware, their dial-up IP pool may already be block > by different anti-spam RBLs. Your mail may not arrive at all. > So blast.ph (and probably skyinet.net) don't know what they're doing wrt SMTP (kulit! ;)... > The reason why there is a delay between the time you press ^X in pine and > when you regain control is because the data needs to move between your > dialup connection to your ISPs SMTP server first, which is not always that > fast especially if you are doing some other stull (like surfing). > True... but in cases where you have multiple recepients, the localhost shouldn't be doing individual send-offs: it should check-in to the smarthost only a single instance of the mail, since the smarthost will be the one to deal with the multiple recepients. Of course, this doesn't necessarily apply if you're going to send several different emails to different recepients... Cheers, Zakame -- |*-------------ZAK B. ELEP (Registered Linux User #327585)-------------*| |* Web: http://zakame.spunge.org GPG ID: 0xFA53851D *| |* Phone: (+63)916-2458830 ICQ UIN: 33236644 *| |*----------1486 7957 454D E529 E4F1 F75E 5787 B1FD FA53 851D----------*| Debian - When you've got better things to do than to fix a borken system
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