Hello Symantec team!
Since February 24, 2018, we are facing problem during send email to messagelabs.com server.
We are an ISP and maintain several mail server. Some of our client faced this problem. Here is the server log:
(connect to cluster6a.us.messagelabs.com[216.82.251.230]:25: Connection timed out)
Mar 14 08:12:35 vmail18 postfix/smtp[3547]: B1684819DA: to=<
anguyen@hybridapparel.com>, relay=none, delay=377916, delays=377765/0.02/150/0, dsn=4.4.1, status=deferred (connect to cluster6.us.messagelabs.com[216.82.251.38]:25: Connection timed out)
Our findings regarding the domain taili-apparels.com:
#SPF Record
v=spf1 ip4:203.112.72.18 ip4:61.247.187.74 a:mail.taili-apparels.com mx:mail.taili-apparels.com ~all
#PTR record
PTR 203.112.72.18 mail.taili-apparels.com
#MX record
10 mail.taili-apparels.com 203.112.72.18
We are asking you to allow this IP group, because our mails clients are being rejected.
The IP's are:
203.112.72.18 (IP CIDR:203.112.72.0/26)
61.247.187.74 (IP CIDR:61.247.187.72/30)
114.134.93.74 (IP CIDR:114.134.93.72/30)
Thanks
Kamrul Ahsan