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Mail cannot send to sophos customers, Client host [xx.xx.xx.xx] is blacklisted...

Marco Ceccarelli

We have an SMTP postfix server for our customers, they send mail to sophos customers and these are blocked:

<xxxxxx@xxxxxxxxit>: host
mx-01-eu-west-1.prod.hydra.sophos.com[52.30.72.188] said: 554 5.7.1 Service
unavailable; Client host [91.121.253.253] is blacklisted. Visit
www.sophos.com/.../ip-lookup.aspx
to request delisting (in reply to RCPT TO command)

The problem is that sophos ip check respond OK and the support chat says me to call the recipient and ask to open a ticket...

There are other more professional solutions?



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  • 0 in reply to Kyle Parrish

    May 18 16:54:19 magic-gra1 postfix/smtp[11738]: ..., relay=mx-01-eu-central-1.prod.hydra.sophos.com[52.58.154.181]:25, delay=0.99, delays=0.08/0/0.76/0.15, dsn=5.7.1, status=bounced (host mx-01-eu-central-1.prod.hydra.sophos.com[52.58.154.181] said: 554 5.7.1 Service unavailable; Client host [91.121.253.253] is blacklisted. Visit www.sophos.com/.../ip-lookup.aspx to request delisting (in reply to RCPT TO command))
    May 18 16:57:27 magic-gra1 postfix/smtp[10297]: ..., relay=mx-01-eu-central-1.prod.hydra.sophos.com[52.59.152.81]:25, delay=0.71, delays=0.06/0/0.5/0.15, dsn=5.7.1, status=bounced (host mx-01-eu-central-1.prod.hydra.sophos.com[52.59.152.81] said: 554 5.7.1 Service unavailable; Client host [91.121.253.253] is blacklisted. Visit www.sophos.com/.../ip-lookup.aspx to request delisting (in reply to RCPT TO command))
    May 18 17:17:54 magic-gra1 postfix/smtp[18842]: ..., relay=mx-01-eu-central-1.prod.hydra.sophos.com[52.58.154.181]:25, delay=0.65, delays=0.24/0/0.27/0.14, dsn=5.7.1, status=bounced (host mx-01-eu-central-1.prod.hydra.sophos.com[52.58.154.181] said: 554 5.7.1 Service unavailable; Client host [91.121.253.253] is blacklisted. Visit www.sophos.com/.../ip-lookup.aspx to request delisting (in reply to RCPT TO command))
    May 18 17:25:37 magic-gra1 postfix/smtp[20268]: ..., relay=mx-02-eu-central-1.prod.hydra.sophos.com[52.58.154.181]:25, delay=0.68, delays=0.22/0/0.31/0.15, dsn=5.7.1, status=bounced (host mx-02-eu-central-1.prod.hydra.sophos.com[52.58.154.181] said: 554 5.7.1 Service unavailable; Client host [91.121.253.253] is blacklisted. Visit www.sophos.com/.../ip-lookup.aspx to request delisting (in reply to RCPT TO command))
    May 18 18:27:52 magic-gra1 postfix/smtp[6267]: ..., relay=mx-01-eu-west-1.prod.hydra.sophos.com[34.250.76.189]:25, delay=0.95, delays=0.22/0/0.69/0.04, dsn=5.7.1, status=bounced (host mx-01-eu-west-1.prod.hydra.sophos.com[34.250.76.189] said: 554 5.7.1 Service unavailable; Client host [91.121.253.253] is blacklisted. Visit www.sophos.com/.../ip-lookup.aspx to request delisting (in reply to RCPT TO command))
    May 19 09:13:56 magic-gra1 postfix/smtp[8041]: ..., relay=mx-01-eu-central-1.prod.hydra.sophos.com[52.59.152.81]:25, delay=0.63, delays=0.15/0/0.34/0.15, dsn=5.7.1, status=bounced (host mx-01-eu-central-1.prod.hydra.sophos.com[52.59.152.81] said: 554 5.7.1 Service unavailable; Client host [91.121.253.253] is blacklisted. Visit www.sophos.com/.../ip-lookup.aspx to request delisting (in reply to RCPT TO command))
    May 19 09:14:12 magic-gra1 postfix/smtp[8024]: ..., relay=mx-01-eu-west-1.prod.hydra.sophos.com[52.30.72.188]:25, delay=0.68, delays=0.23/0/0.4/0.05, dsn=5.7.1, status=bounced (host mx-01-eu-west-1.prod.hydra.sophos.com[52.30.72.188] said: 554 5.7.1 Service unavailable; Client host [91.121.253.253] is blacklisted. Visit www.sophos.com/.../ip-lookup.aspx to request delisting (in reply to RCPT TO command))
    May 19 09:37:24 magic-gra1 postfix/smtp[14129]: ..., relay=mx-01-eu-central-1.prod.hydra.sophos.com[52.58.154.181]:25, delay=0.54, delays=0.1/0/0.3/0.14, dsn=5.7.1, status=bounced (host mx-01-eu-central-1.prod.hydra.sophos.com[52.58.154.181] said: 554 5.7.1 Service unavailable; Client host [91.121.253.253] is blacklisted. Visit www.sophos.com/.../ip-lookup.aspx to request delisting (in reply to RCPT TO command))
    May 19 10:32:31 magic-gra1 postfix/smtp[823]: ..., relay=mx-01-eu-central-1.prod.hydra.sophos.com[52.58.154.181]:25, delay=0.96, delays=0.21/0/0.6/0.15, dsn=5.7.1, status=bounced (host mx-01-eu-central-1.prod.hydra.sophos.com[52.58.154.181] said: 554 5.7.1 Service unavailable; Client host [91.121.253.253] is blacklisted. Visit www.sophos.com/.../ip-lookup.aspx to request delisting (in reply to RCPT TO command))

  • 0 in reply to Marco Ceccarelli

    Interesting, Sophos Labs clearly shows it is not blocked (on their threat list). 

    Hopefully someone from Support can chime in. The link to dispute an IP seems to go in loops...

  • 0 in reply to Kyle Parrish

    the problem is that seem that sophos does not offer the minimal contact if you are not a sophos customer.. 
    via online chat says me to ask the recipient to open a case but the recipient is not clearly a sysadmin

  • 0 in reply to Marco Ceccarelli

    In this case, I would think the owner/admin of the IP address should have a way to request removal from the blacklist. I know this was an option but I can't find the URL. can you offer any assistance on where this can be done?

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