php - Zend Framework 2 mailing not working on CentOS 7 -

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basically there custom class mail extends zend\mail\message , uses zend\mail\transport\smtp send mails html template, works nice, it's not written me. working on ubuntu server , works on localhost, it's not working on centos 7 server. i've tried there on web, "service sendmail restart/start/status" returns no such file or directory though sendmail shows /usr/sbin/sendmail. i'm not familiar linux.


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