经反复试验，mailx发邮件的配置如下：

set from=XXX@hotmail.comset smtp=smtp://smtp.office365.com:587set smtp-auth-user=XXX@hotmail.comset smtp-auth-password=XXXset smtp-auth=loginset smtp-use-starttls=yesset ssl-verify=ignoreset nss-config-dir=/root/.certs/

Zoho配置

set from=XXX@zoho.comset smtp=smtps://smtp.zoho.com:465set smtp-auth-user=XXX@zoho.comset smtp-auth-password=XXXset smtp-auth=loginset ssl-verify=ignore

mailx -v(verbose) -s(title) -a(attachment) abc@abc.com