external email delayed issue
Hi, I've been getting a few external people saying there getting bounce backs.
I've managed to get my hands on there bounce backs, The errors don't mention our company at all. or our ISP.
I have gone through the exchange server we have and cannot find any issues. Yet we seem to be getting most emails.
would you mind taking a look over the bounce backs to see if you can tell me where the issue maybe occuring. and why
see attached docs.
bounce-3.txt
I've managed to get my hands on there bounce backs, The errors don't mention our company at all. or our ISP.
I have gone through the exchange server we have and cannot find any issues. Yet we seem to be getting most emails.
would you mind taking a look over the bounce backs to see if you can tell me where the issue maybe occuring. and why
see attached docs.
bounce-3.txt
ASKER
we have a watchguard firebox xtm-22
the hosting is with plus.net and they have the mail setup to directly smtp to our exchange.
the only spam filter enabled is the exchange one.
what the other end has i don't know.
the hosting is with plus.net and they have the mail setup to directly smtp to our exchange.
the only spam filter enabled is the exchange one.
what the other end has i don't know.
Are your MX records pointing to plus.net or to your server directly?
If to plus.net then the problem is with their servers. If you are on a static address then I would seriously consider switching to direct MX delivery instead.
Simon.
If to plus.net then the problem is with their servers. If you are on a static address then I would seriously consider switching to direct MX delivery instead.
Simon.
ASKER
just did this on mxtoolbox, assume theres a time out issue or spam filter ?
220 remote.mydomain.uk.net ESMTP Service ready [5725 ms]
EHLO please-read-policy.mxtoolb
250-Requested mail action okay, completed
250-SIZE 10000000
250-8BITMIME
250-STARTTLS
250 OK [764 ms]
MAIL FROM: <supertool@mxtoolbox.com>
250 Requested mail action okay, completed [764 ms]
RCPT TO: <test@example.com>
550 Requested action not taken: mailbox unavailable [5756 ms]
QUIT
SendSMTPCommand: You hung up on us after we connected. Please whitelist us. (connection lost)
MXTB-PWS3v2 14180ms
220 remote.mydomain.uk.net ESMTP Service ready [5725 ms]
EHLO please-read-policy.mxtoolb
250-Requested mail action okay, completed
250-SIZE 10000000
250-8BITMIME
250-STARTTLS
250 OK [764 ms]
MAIL FROM: <supertool@mxtoolbox.com>
250 Requested mail action okay, completed [764 ms]
RCPT TO: <test@example.com>
550 Requested action not taken: mailbox unavailable [5756 ms]
QUIT
SendSMTPCommand: You hung up on us after we connected. Please whitelist us. (connection lost)
MXTB-PWS3v2 14180ms
Exchange and most spam filters do have a tarpit functionality. That might be what you are seeing there. However unless you have munged the results, that doesn't look like an Exchange response.
Simon.
Simon.
ASKER
no, not changed the results. bar the domain names on show.
the timeout, thats likely to be the exchange server isn't it.
the timeout, thats likely to be the exchange server isn't it.
ASKER CERTIFIED SOLUTION
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It appears there are multiple addressees on the email. Are there more than 25? Have had issues sending emails with more than 25 addresses in to or cc.
ASKER
There a few but no where near that.
We have a problem from anotget source with the delayed issue only sending the one email address
We have a problem from anotget source with the delayed issue only sending the one email address
ASKER
the problem ended up being our router, we have a watchguard firebox, with which we disabled the smtp proxy and just enabled the smtp packet filter. this sorted the issue within seconds, all delayed emails flooded in.
thanks for your help
thanks for your help
ASKER
this gave me some direction to look at some thing else rather than exchange,
What is between Exchange and the internet?
Simon.