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Say if I wish not to send a email to an address even by mistake because I want to maintain no contact between the 2 emails, is it possible to set up some kind of outgoing filter to it?

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migrated from superuser.com Mar 7 '12 at 3:46

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up vote 2 down vote accepted

You can setup filters on outgoing mail to add labels, but at present there is no way to BLOCK outgoing mail to a specific address.

If you are using Google Apps for Business, you can enable Postini which supports whitelist and blacklists

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u mean to say its available in Google Apps for Business? – Thale Mar 7 '12 at 8:18
@thale yes, using postini you can whitelist or blacklist email addresses & IP's - see updated question – OrangeBox Mar 8 '12 at 22:50

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