I installed ISPConfig on Debian (dedicated server), domain had SPF record. When I send an email to the users, there are some target servers refuse to talk. The below message copy from postfix queue. E67CA2007E 1215 Fri Sep 28 00:00:02 [email protected] (host hnicpmaa01.vnn.vn[222.255.37.13] refused to talk to me: 521 hnicpmaa01.vnn.vn Service not available - no PTR record for 210.245.87.194). In addition, when i send email to yahoo, almost to bulk mail, some working fine How do I solve this problem?
Ok,No PTR record is solved!! When I send email to yahoo account, Yahoo mail can not receive and I can not get any bounce email. What is going on? I get log like this: Code: Oct 2 16:32:20 sic-corp postfix/smtp[21495]: 31D1C1FBB4: host f.mx.mail.yahoo.com[68.142.202.247] refused to talk to me: 421 Message from (210.245.87.194) temporarily deferred - 4.16.50. Please refer to http://help.yahoo.com/help/us/mail/defer/defer-06.html Oct 2 16:32:21 sic-corp postfix/smtp[21495]: 31D1C1FBB4: host e.mx.mail.yahoo.com[216.39.53.1] refused to talk to me: 421 Message from (210.245.87.194) temporarily deferred - 4.16.50. Please refer to http://help.yahoo.com/help/us/mail/defer/defer-06.html Oct 2 16:32:22 sic-corp postfix/smtp[21495]: 31D1C1FBB4: host c.mx.mail.yahoo.com[216.39.53.3] refused to talk to me: 421 Message from (210.245.87.194) temporarily deferred - 4.16.50. Please refer to http://help.yahoo.com/help/us/mail/defer/defer-06.html Oct 2 16:32:27 sic-corp postfix/smtp[21495]: 31D1C1FBB4: to=<[email protected]>, relay=a.mx.mail.yahoo.com[209.191.118.103]:25, delay=7.3, delays=0.02/0.01/6.4/0.83, dsn=2.0.0, status=sent (250 ok dirdel) Oct 2 16:32:27 sic-corp postfix/qmgr[17798]: 31D1C1FBB4: removed
