problem mail ” 501 Domain must resolve “

Problem :

eo@test.com
    SMTP error from remote mail server after MAIL
FROM: SIZE=132689:
    host mail.test.com [200.99.130.4]:
    501 Domain must resolve

Solusi :

biasnaya Ini dikarenakan mail helonya tidak sesuai dengan ptr recordnya

cek PTR record nya

cek in >> http://www.emailtalk.org/ptr.aspx

yg benar :

PTR Check Results Click Here to Monitor >> ibis-jakarta-cawang.com.
203.99.131.76 PTR points to ibis-jakarta-cawang.com.

or

PTR Check Results Click Here to Monitor
111.68.116.14 PTR points to mail.alvindocs.com.

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