Speed Up the Performance of the Internet Agent when performing DNS lookup for a MX record
Novell Cool Solutions: Tip
By Kiril Stankov
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Posted: 23 Jun 2005
Sometimes your GroupWise users communicate frequently with specific email resipients or Internet Domains. The GWIA will perform a DNS lookup for the MX record of the recipient's domain each time a message is sent. You can speed up the performance of the Internet Agent, by instructing it to use 'hardcoded' IP address for given domains.
The solution is very simple.
- Create a file, called route.cfg in the GWIA's gateway folder (usually under <DOMAIN>\GWIA).
- Open the file in a text editor and enter the IP address of the SMTP server (MX record) for each of the domains in your frequent recipients list. Example of the file is shown below.
- Save it and restart GWIA.
Note that the second line contains a 'fake' domain. This is useful, if you have another email system in your network, and you want GWIA to send email directly to it.
This is a 'cool solution', BUT - be aware. MX records can change and do change. So, if you use it - check the MX records of the routed domains frequently. You can get a list of these MS records automatically, by using NSLookup, called with an input file. But.. this will come in next tip :)
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