Exchane 2007 - More than 1 alias

Hi Experts. We have Excgange 2007. I have some users that have more than 1 email address due to their surnames. exmaple is penny@domain.co.za then penny1@domain.co.za and penny2@domain.co.za........i have all these email addresses in her proerties on the server but external emails only come to the first 2 emails which is penny@domain.co.za and penny1@domain.co.za but NOT penny2@domain.co.za. However, if i send mails internally then it goes to all these addresses perfectly. Please help.
BSTITAsked:
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SnowWolfCommented:
Are MX records directed to your server? Or is there something that scan's mail first?
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Antonio VargasMicrosoft Senior Cloud ConsultantCommented:
An E-mail relay appliance may be blocking the mails to the third smtp address. Like snowwolf asked, are the mails comming directly to exchange or is there anytjing filtering mail?
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BSTITAuthor Commented:
not 100% the solution
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