Combemartin
asked on
Exchange 2003 new ISP problem
Just installed a new ISP, created a new MX called mail4.company.com 5 , the old ISP is known as mail2.company.com which I left as is but set it to 10.
All incoming is fine as expected, but outgoing seem to be an issue,
First I sent out 2 emails from a users account, with a 5 min gap between them, they both sat in the queue with the error :
The connection was dropped due to an SMTP protocol event sink
While I were trying to find answers and test with nslookup and telnet, almost 10 mins after they sat in the queue, they just vanished, and strange as it is, these two emails arrived at my gmail account, so it seem like SMTP must be working, then I tried two more but its almost 20mins and they are still in the queue with the same error as above.
Can someone explain to me what is going on ?
I have PTR set for the new IP against the domain name so not sure what else I can do on this one.
Thanks
All incoming is fine as expected, but outgoing seem to be an issue,
First I sent out 2 emails from a users account, with a 5 min gap between them, they both sat in the queue with the error :
The connection was dropped due to an SMTP protocol event sink
While I were trying to find answers and test with nslookup and telnet, almost 10 mins after they sat in the queue, they just vanished, and strange as it is, these two emails arrived at my gmail account, so it seem like SMTP must be working, then I tried two more but its almost 20mins and they are still in the queue with the same error as above.
Can someone explain to me what is going on ?
I have PTR set for the new IP against the domain name so not sure what else I can do on this one.
Thanks
ASKER
The server were working fine with the old ISP except for poor speed, not sure what you meant by how is it configured?
Just restarting the server so should have access to events soon, what should I be looking for ?
Thanks
Just restarting the server so should have access to events soon, what should I be looking for ?
Thanks
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Yes, davorin has also a very good point. You might like this link as well.
Missed the PTR part of the question (note to self - read the full question before answering)!
My comment about www.blacklistalert.org is still relevant though - the new IP may be a dirty IP Address and thus you may need to get it removed from some blacklists before mail-flow returns to normal.
My comment about www.blacklistalert.org is still relevant though - the new IP may be a dirty IP Address and thus you may need to get it removed from some blacklists before mail-flow returns to normal.
PTR Record
DKIM Record
SPF Record
Domain-keys
Blacklist status
Many factors are responsible to get the mail delivered.
;)
DKIM Record
SPF Record
Domain-keys
Blacklist status
Many factors are responsible to get the mail delivered.
;)
Your SMTP send connector seems to be working, question is why it is not functioning as wanted. How is it configured?
Are there event logs giving more info?