我正在尝试使用 sendmail 发送电子邮件。我遵循了这个操作方法：http : //linuxconfig.org/configuring-gmail-as-sendmail-email-relay
我试图通过控制台发送电子邮件：
echo "Just testing my sendmail gmail relay" | mail -v -s "Sendmail gmail Relay - New Server" user@gmailcom
命令的输出是：
WARNING: local host name (server01) is not qualified; see cf/README: WHO AM I?
user@gmail.com... Connecting to [127.0.0.1] via relay...
220 server01 ESMTP Sendmail 8.14.4/8.14.4; Thu, 10 Dec 2015 18:05:36 -0200
>>> EHLO server01
250-server01 Hello server1 [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-DELIVERBY
250 HELP
>>> MAIL From:<root@server01> SIZE=279 …