Compulsory Smtp From Isp?

[bremonts]

Hi,

Without any notice, since this morning Nov. 11th, our CSLoxinfo internet provider is blocking the use of SMTP service* from the domain/server we own abroad.

They explain we should use their "smtp.csloxinfo.com" instead.

Is such restriction linked with government's new policy for internet security?

If yes, what is the actual situation for corporates relying on a global communication system?

Thanks for your insights.

Les

*Sending' reported error (0x800CCC0F) : 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP).'

[monty]

There's several ISP's doing this.

CAT ADSL for example.

Huge nightmare as often the SMTP servers from the Thai ISP's are blacklisted because of allowing open relay...

Some mail servers allow you to change the port (normally 25 for unsecured smtp), which often bypasses their block. If you can do that with your servers you're probably good to go...

Gmail uses port 465 for SMTP if I recall correctly and that one sails straight through while any SMTP server on port 25 is blocked.

Just recently I can't get to my own smtp server using TT&T's maxnet, so now reverted to their smtp server (smtp.tttmaxnet.com)

[Guest Reimar]

I using the Alternate Port service from No-IP.com, which I also use for as DNS provider for static and dynamic connections. That works very well and I don't have any problems.

Cheers.

[joncl]

Hi,

Without any notice,

for what is worth, I got a letter from them in the real mail explaining all this last month and why as 1,000's of others did, and it was on their web site to.

[onethailand]

I found out the hard way

Best thing to do is ask your web host if they support alternative ports for SMTP.

[wxpwzrd]

And while you are asking... ask them if they support secured SMTP and POP so that you are not transmitting your emails in the clear. With everything else that is screwed up with Thai Internet, I would not be surprised that their networks are about as secure as a sponge.

[bremonts]

Thanks to Monty's suggestion, <Some mail servers allow you to change the port (normally 25 for unsecured smtp), which often bypasses their block.>

we switched the port to 587 from 25 on the mail server, tuned accordingly our e-mail client program and it works fine.