Can I unblock Port 25 on Spark MBB?

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timbosan

2160 posts

Uber Geek

#1287044 18-Apr-2015 23:03

SirHumphreyAppleby:
timbosan: But wouldn't that still be blocked as its still transferring to the Exchange server over Port 25?

No, because over the mobile network, you're establishing an outbound SSH connection on port 22, not trying to receive a connection on port 25.

Oh, you mean it establishes a tunnel, and transfers the data through the tunnel using SSL? Clever.

SirHumphreyAppleby

2849 posts

Uber Geek

#1287075 19-Apr-2015 07:14

timbosan: Oh, you mean it establishes a tunnel, and transfers the data through the tunnel using SSL? Clever.

Correct. SSH supports port forwarding both from the client system and remote system, plus dynamic sockets (using SOCKS). Binding to an external IP from a remote host does require a minor OpenSSH configuration change on the server, but it's a quick and easy solution when you need to workaround something like this.

BarTender

3606 posts

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#1287216 19-Apr-2015 14:31

timbosan:
sbiddle:
I'm still not sure how you're going to receive mail even if you overcome APN and firewall issues, your IP will keep changing continually.

That's what I thought, but it's mean constant for 48 hours. Even if it changed every few days, it doesn't matter as I hope to be back on DSL within a week.

However it is an interesting exercise - I would have liked to be able to have this set up running for just email, and use up the credit I have on the SIM.

How often would you have expected it to change sbiddle?

Maximum session time is 23:59:59. So like others I would just run an external vps and run dovecot or sendmail to queue up all your mail and pull it from there.

Low end vps with a full ipv4 is 10 per year or so. Plus getting spammed all the time on mbb could end up with a nasty bill.

timbosan

2160 posts

Uber Geek

#1287666 20-Apr-2015 12:26

An update to this:

I looked into the VPS option, either as a way to tunnel the data over SSH, or as a way to run SendMail, and came across 25st (http://25mail.st/) which offer a free mailbox server/VPS with limits that are OK for my needs. They basically setup a mail server, you point your MX record to them, and bob's your fathers brother. All up took about 2 hours as they manually review the application to try and stop spam.

I am quite happy with the setup, I have a webmail interface, and I am already getting some of my old email through!

Thanks all to the suggestions, now I just need to get my own server running again, change the MX record back, and work on getting the emails down from 25st (I can use Outlook Express or something and merge them into Outlook).

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