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dnl marks rest of the line as m4 comment Sendmail by default masquerades only header sender addresses. Use FEATURE(masquerade_envelope) to masquerade envelope sender and FEATURE(allmasquerade) to masquerade header recipients. (SENDMAIL) MASQUERADING AND RELAYING


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Your permissions issue is not a file permissions issue but SELinux disallowing the sendmail executable from accessing files on the filesystem in a specific location. Your best friend for dealing with these is to use the SELinux troubleshooter GUI. $ sealert -b     You'll then want to follow the advice to add the necessary contexts to your ...


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There are several TLS related settings you can use in the access map: try_tls is used when sendmail is a client (i.e. sending email) tls_srv applies to servers, when sendmail is a client (i.e. sending email) tls_clt applies to clients, when sendmail is a server (i.e. accepting email) srv_features is used when sendmail is a server (i.e. accepting email), ...


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I would double check the output of make when you built it for warnings or errors. If there is no binary of sendmail present then it didn't build properly. Also look for sendmail using find within the source tree. Often times binaries are put into a different directory. $ find . -type f | grep sendmail$ Compilation issues Based on your newest edit these 2 ...


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You may change "this host email name" (used in Received headers) defining confDOMAIN_NAME. https://www.sendmail.com/sm/open_source/docs/m4/whoami.html By default sendmail's masquerading changes only header sender (e.g. From: header). It may be configured to change envelope sender (MAIL FROM: in SMTP session) and/or header recipients (e.g. To: and Cc: ...


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Make sure there is no no-reply OS account Remove "custom error" entry i virtusertable


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As I need to receive emails for some other users, is there anyway I can block incoming mails and yet allow outgoing ones without closing inbound port 25 on my firewall? If you are running a server, you must be aware that there are always attacks, so the entry in virtusertable may not be enough. To block no-reply emails and block a lot of other ...


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I would add an entry to your /etc/aliases file like so: no-reply: /dev/null Be sure to rebuild the aliases database with the newaliases command afterwards. References How can I point an email alias at /dev/null?



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