Email follies

some of our members here have problems sending to addresses at BTinternet.com

they get an I/O error message

our message has encountered delivery problems
to the following recipient(s):

[email protected]
Delivery failed


Failed to deliver to domain btinternet.com after 1152 tries. Last
error was: I/O error encountered

or just delivery failure
and then all emails arrive several days later and at the same time.

there are at least 6 addresses that i know personally that are effected and others here report it too.

I have verified all the addrresses i know of problems with on the www.network-tools.com email validation program, and users of other ISPs (and ive verified thsi too) CAN send to the BTinternet.com adrresses with no problems.
our sysadmin team doesnt reply to my emails about it (im only first line, what do i know?) and im getting some very angry customers calling me and i cant give them answers.

HELP!

Quote:

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Originally posted by Chëëzmønkëy
some of our members here have problems sending to addresses at BTinternet.com

they get an I/O error message

our message has encountered delivery problems
to the following recipient(s):

[email protected]
Delivery failed


Failed to deliver to domain btinternet.com after 1152 tries. Last
error was: I/O error encountered

or just delivery failure
and then all emails arrive several days later and at the same time.

there are at least 6 addresses that i know personally that are effected and others here report it too.

I have verified all the addrresses i know of problems with on the www.network-tools.com email validation program, and users of other ISPs (and ive verified thsi too) CAN send to the BTinternet.com adrresses with no problems.
our sysadmin team doesnt reply to my emails about it (im only first line, what do i know?) and im getting some very angry customers calling me and i cant give them answers.

HELP!

---

BT recently put in place an antispam option... might be worth looking at what effect that has.

ah thats a start, thanks!

ok.. i recently had the EXACT same problem... only with AOL adresses...

What happen was, our exchange server (missing 1 patch, DOH) had started bieng used as an exchange relay server for spam... and there are a few databases out there that antispam software uses... our @blah.blah had been added and BLACKLISTED. DOH!

www.exchangeadmin.org has LOTS of info on open relays and how to secure your email servers.

To get off the list... find out which one your on... (if more than one.. you do it for each one)

goto there www site and get the contact info for whoever or whatever email you need to send a letter to... then most sites have you goto a mail relay testing site where it runs a crapload of relay test through your server.. you cut and paste that log and email it to them.... they will... at their convience.. check it (the log) and then double check you... if your secure you'll be removed and it then take 30 -90 days for all the major users of the antispam software to get the updated lists.

took us here 6 months to get it all straight, secure and removed from ALL list and able to send mail to ANYONE.

it is easy to get on the list, just one sick day, missing 1 patch during a busy time of the year, and at the same time a lucky spam hacker checks your email domain.

Getting off the list... is like getting an organ transplant... get on the list and PROVE IT!

Good Luck

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*EDIT*

Also make sure a client isnt infected with a virus using that machine as a spam sender... they get a email and the viruass automatically sends it to 100's or 1000's of others.

Noo- could you be a little more specific whith what they have done,

does it require our server to support reverse lookup? as this is currently not enabled on our network

I think if our server was blacklisted it would be affecting a lot more people and no emails at all would get through to BT they would not just be delivered a few days later. Our server is definetly not open relay the only IP's allowed to send email through it our own dialup IP ranges plus there is varius SPAM protection within Mailsite like Blacklist lookups, recipient limits and SMTP authentication .

Not a bad idea though !!!

Our corporate email server was blacklisted by the ORBS (Now called ORDB) database for three weeks before we realized that anything was wrong. There was only one person that we couldn't send email to, and we finally figured out what the rejection message that came back meant. If we had been on the blacklist for one more week, our IP would have been publicly published by ORBS so that other blacklists could add it to their databases. I'm sure that once that happened, it would have screwed us over real good.

Quote:

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Originally posted by MacGyver
Our corporate email server was blacklisted by the ORBS (Now called ORDB) database for three weeks before we realized that anything was wrong. There was only one person that we couldn't send email to, and we finally figured out what the rejection message that came back meant. If we had been on the blacklist for one more week, our IP would have been publicly published by ORBS so that other blacklists could add it to their databases. I'm sure that once that happened, it would have screwed us over real good.

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how does one contact these people, or do they have a websitE?

Quote:

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Originally posted by Chëëzmønkëy
Noo- could you be a little more specific whith what they have done,

does it require our server to support reverse lookup? as this is currently not enabled on our network

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Not really got any technical details on it, as I am just a subscriber... but here is the customer info page

thanks noo, ill email their tech support people and laugh at the auto response email.
course chances of getting someone who isnt a trained monkey is pretty slim :)

the number of our members affected by this is growing daily.

i finally got a reply from a real person at BT, and all he said was to send him the headers off the rejection emails. great.