In the simple case, assuming you are using authentication, you should be able to just lock the unix account.
usermod --lock <username>
Caveat: this would also prevent reading mail, if your IMAP server is running on the same box.
Hope this helps!
Merlin
--
Merlin Hartley
IT Systems Engineer
MRC Mitochondrial Biology Unit
Cambridge, CB2 0XY
United Kingdom
> On 13 Jun 2016, at 18:50, Dennis Isaías Cervantes <dennis.cervantes@???> wrote:
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> Hi good morning
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> I would like if you help me on how I can do to prevent a specific account
> send emails or off for some time, use exim 4.80.1 with mysql
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> thank you, for your help
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