服务器有2个用户：admin和joe。两个用户属于同一组。
如果我尝试从属于admin的域（通过php脚本）发送电子邮件 - 一切正常。但是对于属于joe的域 - 函数mail()不发送电子邮件。
我在mail.log中启用了php.ini，看到php工作正常。
Apache / 2.4.16（FreeBSD）mpm-itk / 2.4.7-02
exim 4.86
/usr/local/etc/exim/passwd - 空
mainlog, paniclog - 没有错误
结果exim -bd -d+all：
WHITELIST_D_MACROS unset
TRUSTED_CONFIG_LIST unset
12:54:37 8586 changed uid/gid: forcing real = effective
12:54:37 8586 uid=0 gid=0 pid=8586
12:54:37 8586 auxiliary group list: 0
12:54:37 8586 seeking password data for user "www": cache not available
12:54:37 8586 getpwnam() succeeded uid=80 gid=80
12:54:37 8586 seeking password data for user "mailnull": cache not available
12:54:37 8586 getpwnam() succeeded uid=26 gid=26
12:54:37 8586 seeking password data for user "root": cache not available
12:54:37 8586 getpwnam() succeeded uid=0 gid=0
12:54:37 8587 changed uid/gid: calling tls_validate_require_cipher
12:54:37 8587 uid=26 gid=6 pid=8587
12:54:37 8587 auxiliary group list: 6
12:54:37 8586 tls_validate_require_cipher child 8587 ended: status=0x0
12:54:37 8586 configuration file is /usr/local/etc/exim/configure
12:54:37 8586 log selectors = 0000cffe 00733801
12:54:37 8586 cwd=/etc 3 args: exim -bd -d+all
12:54:37 8586 trusted user
12:54:37 8586 admin user
12:54:37 8586 DSN: dnslookup propagating DSN
12:54:37 8586 DSN: disabled_domains propagating DSN
12:54:37 8586 DSN: disabled_users propagating DSN
12:54:37 8586 DSN: local_domains propagating DSN
12:54:37 8586 DSN: group_aliases propagating DSN
12:54:37 8586 DSN: aliases propagating DSN
12:54:37 8586 DSN: aliases_pipe propagating DSN
12:54:37 8586 DSN: local_users propagating DSN
12:54:37 8586 DSN: catchall_for_domains propagating DSN
12:54:37 8586 DSN: unknown_users propagating DSN
12:54:37 8586 DSN: autoreplay propagating DSN
12:54:37 8586 DSN: localuser propagating DSN
12:54:37 8586 DSN: a_dnslookup propagating DSN
12:54:37 8586 DSN: a_disabled_domains propagating DSN
12:54:37 8586 DSN: a_disabled_users propagating DSN
12:54:37 8586 DSN: a_local_domains propagating DSN
12:54:37 8586 DSN: a_aliases propagating DSN
12:54:37 8586 DSN: a_aliases_pipe propagating DSN
12:54:37 8586 DSN: a_local_users propagating DSN
12:54:37 8586 DSN: a_catchall_for_domains propagating DSN
12:54:37 8586 originator: uid=0 gid=0 login=root name=Charlie Root
12:54:37 8586 LOG: MAIN
12:54:37 8586 IPv6 socket creation failed: Protocol not supported
12:54:37 8586 LOG: MAIN
12:54:37 8586 Failed to create IPv6 socket for wildcard listening (Protocol not supported): will use IPv4
12:54:37 8586 LOG: MAIN
12:54:37 8586 socket bind() to port 25 for address (any IPv4) failed: Address already in use: waiting 30s before trying again (9 more tries)
答案 0 :(得分：1)
默认情况下，除[FirstSuite] + mvn -s settings.xml -f java/pom.xml integration-test -P dev -Dmaven.repo.local=.repository -Dit.test=FirstSuite -Djava.io.tmpdir=java/target -Dlog.dir=java/target/FirstSuite
[FirstSuite] Java HotSpot(TM) Server VM warning: ignoring option MaxPermSize=384m; support was removed in 8.0
[FirstSuite] [INFO] Scanning for projects...
[FirstSuite] [ERROR] The build could not read 1 project -> [Help 1]
[PmClientTestsuite] [ERROR]
[FirstSuite] [ERROR] The project (/opt/.jenkins/workspace/MyProject@16/java/pom.xml) has 1 error
[FirstSuite] [ERROR] Non-readable POM /opt/.jenkins/workspace/MyProject@16/java/pom.xml: /opt/.jenkins/workspace/MyProject@16/java/pom.xml (Datei oder Verzeichnis nicht gefunden)
[FirstSuite] [ERROR]
[FirstSuite] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[FirstSuite] [ERROR] Re-run Maven using the -X switch to enable full debug logging.
[FirstSuite] [ERROR]
[FirstSuite] [ERROR] For more information about the errors and possible solutions, please read the following articles:
[FirstSuite] [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
和exim_user之外的所有用户都不受信任，因此无法向其他用户发送邮件。因此，当exim_group调用exim时，它被迫使用sender_address，如php - 因为用户www@host用于启动apache / nginx，调用调用exim的php。
您必须将www用户添加到exim的www或trusted_users。另一种方法是使用SMTP会话而不是直接exim调用。只需将您的PHP配置为使用真正的IP，您的exim正在监听连接，这已经足够了。