nanog mailing list archives
Re: Why do so few mail providers support Port 587?
From: Valdis.Kletnieks () vt edu
Date: Tue, 01 Mar 2005 09:43:19 -0500
On Tue, 01 Mar 2005 09:18:19 EST, Nils Ketelsen said:
2. Port 587 Mailservers only make sense, when other Providers block port 25. My point is: If my ISP blocks any outgoing port, he is no longer an ISP I will buy service from.
That's not when you need a port 587 server...
Therefore I do not need a 587-Mailserver, as I do not use any ISP with Port 25-Blocking for connecting my sites or users.
Port 587 is for when you take your laptop along to visit your grandparents, and they have cablemodem from an ISP that blocks port 25. Now which do you do: 1) Whine at your grandparents about their choice of ISP? 2) Not send the mail you needed to send? 3) Make a long-distance (possibly international-rates) call to your ISP's dialup pool? 4) Send it back to your own ISP's 587 server and be happy? (Hint - there's probably a good-sized niche market in offering business-class mailhosting for people stuck behind port-25 blocks - they submit via 587/STARTTLS and retrieve via POP/IMAP over SSL).
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Current thread:
- Re: Why do so few mail providers support Port 587? Michael . Dillon (Feb 28)
- <Possible follow-ups>
- RE: Why do so few mail providers support Port 587? Michael . Dillon (Feb 28)
- Re: Why do so few mail providers support Port 587? Steven M. Bellovin (Feb 28)
- Re: Why do so few mail providers support Port 587? Nils Ketelsen (Feb 28)
- Re: Why do so few mail providers support Port 587? Valdis . Kletnieks (Feb 28)
- Re: Why do so few mail providers support Port 587? Nils Ketelsen (Mar 01)
- Re: Why do so few mail providers support Port 587? Frank Louwers (Mar 01)
- Re: Why do so few mail providers support Port 587? Nils Ketelsen (Mar 01)
- Re: Why do so few mail providers support Port 587? Valdis . Kletnieks (Mar 01)
- Re: Why do so few mail providers support Port 587? Valdis . Kletnieks (Feb 28)
- Re: Why do so few mail providers support Port 587? Valdis . Kletnieks (Mar 01)
- Re: Why do so few mail providers support Port 587? Michael G (Mar 01)
- Re: Why do so few mail providers support Port 587? Jason Frisvold (Mar 01)
- Re: Why do so few mail providers support Port 587? David Lesher (Mar 01)
- Re: Why do so few mail providers support Port 587? Chris Horry (Mar 01)
- Re: Why do so few mail providers support Port 587? Stephen Fulton (Mar 01)
- Re: Why do so few mail providers support Port 587? David Lesher (Mar 01)
- Re: Why do so few mail providers support Port 587? Jim Popovitch (Mar 01)
- Re: Why do so few mail providers support Port 587? J.D. Falk (Mar 01)
- Re: Why do so few mail providers support Port 587? JC Dill (Mar 01)