# Defining custom analyzer that understands URLS/hostnames/emails and can exclude patterns **URL:** \ **Category:** Elasticsearch\ **Created:** [March 14, 2013, 9:37pm UTC](https://discuss.elastic.co/t/defining-custom-analyzer-that-understands-urls-hostnames-emails-and-can-exclude-patterns/11163 "2013-03-14T21:37:31Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![shadyabhi](https://avatars.discourse-cdn.com/v4/letter/s/edb3f5/32.png) [@shadyabhi](https://discuss.elastic.co/u/shadyabhi)\ **Post date:** [March 14, 2013, 9:37pm UTC](https://discuss.elastic.co/t/defining-custom-analyzer-that-understands-urls-hostnames-emails-and-can-exclude-patterns/11163/1 "2013-03-14T21:37:31Z")
Hi, For ex, if I have a message line like: > Mar 14 20:22:41 subdomain.mydomain.colo postfix/smtpd[16862]: NOQUEUE: > reject: RCPT from unknown[1.2.3.4]: 450 4.7.1 Client host rejected: > cannot find your reverse hostname, [5.6.7.8]; from=[erp@misms.net.in](mailto:erp@misms.net.in) > to=[a@domain1.com](mailto:a@domain1.com) proto=ESMTP helo=\<[a.domain.net](http://a.domain.net)\> also > from=\<\> The standard tokenizer tokenizes emailaddresses and hostnames (if they contain "-" in the hostnames). I would like to have emailaddress and hostnames to not be tokenized. One way I could see that being possible was using char\_filter and replacing "-" with "\_" so that it's not tokenized. It's a way but isn't there a better way without replacing hypens? I also saw uax\_url\_email filter which might be of help. Also, I would like to exclude few words (for ex, "from=\<\>") from tokenizing, I could see that being possible by using word\_delimiter. Can anyone please help me with all this together the right way? One more thing, is it possible to apply both standard and whitespace analyzers on a field? -- Regards, Abhijeet Rastogi (shadyabhi) > **[New community features for Google Chat and an update on Currents](https://workspaceupdates.googleblog.com/2023/04/new-community-features-for-google-chat-and-an-update-currents%20.html)** > > Note:  This blog post outlines upcoming changes to Google Currents for Workspace users. For information on the previous deprecation of Googl... -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 2:46am UTC](https://discuss.elastic.co/t/defining-custom-analyzer-that-understands-urls-hostnames-emails-and-can-exclude-patterns/11163/2 "2017-07-06T02:46:20Z")