1....
This is the Postfix program at host smtp.263.net.
I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.
For further assistance, please contact <postmaster@263.net>
If you do so, please include this problem report. You can
delete your own text from the message returned below.
The Postfix program
<ppingshi@email.com>: host mail-intake-1.mail.com[165.251.32.243] said: 523
<ppingshi@email.com>... The IP address 202.96.44.19 is blacklisted. contact
your administrator for details.
2.....
This is the Postfix program at host smtp.263.net.
I'm sorry to have to inform you that the message returned
below could not be delivered to one or more destinations.
For further assistance, please contact <postmaster@263.net>
If you do so, please include this problem report. You can
delete your own text from the message returned below.
The Postfix program
<h9993711@hkusua.hku.hk>: host ccnfs1.hku.hk[147.8.2.23] said: 550 Mail from
202.96.44.19 refused by blackhole site rbl.maps.vix.com
??????????????????
sorry! i can not sent it to you!