Hello.
I am Matsumoto, the mail administrator.
I work for a Japanese company.
I can't mail to "messagelabs.com". I would like you to investigate.
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From(SMTP Server):
52.197.128.153
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To:
*.us.messagelabs.com
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Error example:
1.Delay long.
cluster4.us.messagelabs.com[216.82.242.33]:25, delay=3628, delays=3625/0.02/2/0.36, dsn=2.0.0, status=sent
2.Service Temporarily Unavailable.
cluster4a.us.messagelabs.com[216.82.251.230]:25, delay=72, delays=0.02/0/69/2.8, dsn=4.0.0, status=deferred (host cluster4a.us.messagelabs.com[216.82.251.230] said: 421 Service Temporarily Unavailable ...
From cluster4 to cluster4a?
There was no problem at this site.
http://ipremoval.sms.symantec.com/lookup/
I think that it is probably blocked.
Or, the evaluation of IP may be dropped.