{"id":153,"date":"2012-05-02T19:21:23","date_gmt":"2012-05-02T19:21:23","guid":{"rendered":"https:\/\/www.rosehosting.com\/blog\/?p=153"},"modified":"2022-12-19T08:06:26","modified_gmt":"2022-12-19T14:06:26","slug":"virtual-users-and-domains-with-sendmail","status":"publish","type":"post","link":"https:\/\/www.rosehosting.com\/blog\/virtual-users-and-domains-with-sendmail\/","title":{"rendered":"Virtual Users And Domains With Sendmail"},"content":{"rendered":"
<\/div>

\"sendmail\"The objective of this guide is to enable Sendmail’s virtual user table, which allows us to configure user-specific and domain-wide email aliases for multiple domains. These instructions assume you are using a CentOS virtual server<\/a>.<\/p>\n

Sendmail uses a highly complex rule system for it’s configuration so instead of editing sendmail.cf directly, we will edit the sendmail.mc file.<\/p>\n

Accepting mail for virtual domains\/users<\/h2>\n

1.Create a new system user and set the password for that user.<\/p>\n

useradd exampleuser\r\npasswd exampleuser<\/pre>\n

2. Add the user to the sendmail’s virtusertable file. Open the ‘\/etc\/mail\/virtusertable’ file and add the following:<\/p>\n

exampleuser@exampledomain.tld    exampleuser<\/pre>\n

Each line in the \/etc\/mail\/virtusertable file should be of the following format:<\/p>\n

username@domainname    systemuser<\/pre>\n

3. Add each new domain name to the \/etc\/mail\/local-host-names file<\/p>\n

exampledomain.tld<\/pre>\n

4. Generate a new sendmail.cf file by using the following commands:<\/p>\n

cd \/etc\/mail\r\nmake all\r\n\/etc\/init.d\/sendmail restart<\/pre>\n

Rewriting outgoing email addresses<\/h2>\n

1. Add the following lines to the \/etc\/mail\/sendmail.mc file:<\/p>\n

FEATURE(masquerade_envelope)\r\nFEATURE(genericstable, `hash -o \/etc\/mail\/genericstable')\r\nGENERICS_DOMAIN_FILE(`\/etc\/mail\/sendmail.gdf')<\/pre>\n

2. Create \/etc\/mail\/genericstable file containing local users mapped to desired addresses:<\/p>\n

exampleuser    exampleuser@exampledomain.tld\r\nexampleuser2    exampleuser2@exampledomain.tld<\/pre>\n

3. Create \/etc\/mail\/sendmail.gdf file containing the fully qualified name of the local mail server.<\/p>\n

host.exampledomain.tld<\/pre>\n

4. Finally, generate a new sendmail.cf file:<\/p>\n

cd \/etc\/mail\r\nmake all\r\n\/etc\/init.d\/sendmail restart<\/pre>\n

PS.<\/strong><\/span> If you liked this post please share it with your friends on the social networks using the buttons on the left or simply leave a reply below. Thanks.<\/p>\n","protected":false},"excerpt":{"rendered":"

The objective of this guide is to enable Sendmail’s virtual user table, which allows us to configure user-specific and domain-wide … <\/p>\n

Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":1132,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1699,1706,13],"tags":[15,1152,14,16],"yoast_head":"\nVirtual Users And Domains With Sendmail - RoseHosting<\/title>\n<meta name=\"description\" content=\"Virtual Users And Domains With Sendmail - RoseHosting\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rosehosting.com\/blog\/virtual-users-and-domains-with-sendmail\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Virtual Users And Domains With Sendmail - RoseHosting\" \/>\n<meta property=\"og:description\" content=\"Virtual Users And Domains With Sendmail - RoseHosting\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.rosehosting.com\/blog\/virtual-users-and-domains-with-sendmail\/\" \/>\n<meta property=\"og:site_name\" content=\"RoseHosting\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/RoseHosting\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/rosehosting.helpdesk\" \/>\n<meta property=\"article:published_time\" content=\"2012-05-02T19:21:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-12-19T14:06:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2012\/05\/sendmail_0_129266.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"200\" \/>\n\t<meta property=\"og:image:height\" content=\"200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jeff Wilson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@rosehosting\" \/>\n<meta name=\"twitter:site\" content=\"@rosehosting\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jeff Wilson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.rosehosting.com\/blog\/virtual-users-and-domains-with-sendmail\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.rosehosting.com\/blog\/virtual-users-and-domains-with-sendmail\/\"},\"author\":{\"name\":\"Jeff Wilson\",\"@id\":\"https:\/\/www.rosehosting.com\/blog\/#\/schema\/person\/7ce77a842fa6a9a7f8efa186f2353713\"},\"headline\":\"Virtual Users And Domains With Sendmail\",\"datePublished\":\"2012-05-02T19:21:23+00:00\",\"dateModified\":\"2022-12-19T14:06:26+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.rosehosting.com\/blog\/virtual-users-and-domains-with-sendmail\/\"},\"wordCount\":219,\"commentCount\":1,\"publisher\":{\"@id\":\"https:\/\/www.rosehosting.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.rosehosting.com\/blog\/virtual-users-and-domains-with-sendmail\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.rosehosting.com\/blog\/wp-content\/uploads\/2012\/05\/sendmail_0_129266.jpg\",\"keywords\":[\"mail\",\"rosehosting\",\"sendmail\",\"virtual domains\"],\"articleSection\":[\"CentOS\",\"Email Servers\",\"Tutorials\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.rosehosting.com\/blog\/virtual-users-and-domains-with-sendmail\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.rosehosting.com\/blog\/virtual-users-and-domains-with-sendmail\/\",\"url\":\"https:\/\/www.rosehosting.com\/blog\/virtual-users-and-domains-with-sendmail\/\",\"name\":\"Virtual Users And Domains With Sendmail - 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Helping other Linux admins with frequent Linux and business-related blog posts on the RoseHosting blog. Techie by choice. Loving nature and travel. 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