This company does not want to deal with spam complaints that originate from their network, so it is an non-integer company that facilitates criminals that plan to cause you harm. Spamcop complaints are refused to be dealt with. So they gives criminals all the changes to spam the world.
If they allow spamming it may also possible that children are not safe for criminals using their network: not suitable.
spam contains zip file with virus
They only way is to block this isp and do not place any business with them. Use only integer companies. Use isp that will not support criminals.
From the header of a spam message: static-mum-126.96.36.199.mtnl.net.in ([188.8.131.52]). "Your new PHS documents are attached." Reportedly from "phsonline.co.uk". Nothing to do with the UK, it's all from India. Message has an attachment, guaranteed phishing item.
More: "FW: Latest order delivery details" (with .zip attachment). Header: static-mum-184.108.40.206.mtnl.net.in ([220.127.116.11]). Block one IP range and another pops up. It's all about scamming. Going RED,
Supporting bol.net.in / Mahanagar Telephone Nigam Ltd., which sustains "medium" to "critical" amounts of spamming IP addresses for 30 days at a time.
http://bgp.he.net/dns/bol.net.in#_whois.(bol.net.in / Mahanagar Telephone Nigam Ltd is supported by mtnl.net.in)
www.senderbase.org/lookup/org/?search_string=Mahanagar%20Telephone%20Nigam%20Ltd (bol.net.in / Mahanagar Telephone Nigam Ltd., which mtnl.net.in supports, sustains "medium" to "critical" amounts of spamming IP addresses for 30 days at a time. See bottom of page)
http://whois.domaintools.com/mtnl.net.in (Registrant owner is the same as for bol.net.in)