[brlug-general] Cox blocking email with numerical IP addresses.

[Petri Laihonen]

Scott Harney wrote:
> Petri Laihonen wrote:
>> Why use cox mail at all?
>>
>> Only couple months after signing up with cox I realized that the mail 
>> service (any direction) was not trustworthy. Especially I did not 
>> want to lose any important business mail, so I decided to start using 
>> my own mail server entirely. I've had to change my mailing 
>> preferences only once when cox started blocking port 25. Now I just 
>> tunnel it through SSH directly to my server. (additional advantage 
>> with tunneling outgoing mail with SSH is that I don't have to worry 
>> about mail sniffing in the public places either....until SSH2 becomes 
>> vulnerable)
>
> Cox also does not filter port 587 (submission).  So if you have a 
> server running SMTP-AUTH+TLS on port 587 you can just send directly to 
> it.  Port 25 is really for mail server to mail server communications 
> and port 587 for authenticated client-> mail server communications.  
> Here's the RFC: http://www.ietf.org/rfc/rfc2476.txt which describes 
> the difference between SMTP and submission mail protocols.
>
> If you use gmail, you can just use gmail as your submission server and 
> bypass Cox entirely.  And you don't need your own server.  Just tell 
> you mail program (kmail, thunderbird) to use "smtp.gmail.com" as the 
> outgoing mail server. Port 587 as the port. And enable SSL encryption.
>
Exellent! Thank you!
I knew there was some additional ports to do this stuff but I never 
really had time to investigate and set it up that way. Additionally I've 
had plans of setting up authentication for outgoing mail via my mail 
server, but never got to that one either......yet....

Gmail option is interesting.... I may need to check that one out as 
well....  Especially if it allows to use some other "sender" address 
than @gmail.com. I was investigating at some point last year perhaps 
having managed mail service system, but did not find any good options 
for it. Gmail does not support IMAP and alone my mailbox size is about 
4.5Gb. (M$ outslurp would die and loose all of it with less than quarter 
of that....)

Petri

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