Question : sendmail smtp in linux

Dear Sir/Madam:

redhat linux as a mailserver with sendmail as SMTP and imap mail server was working fine but now iam not getting any mails from the internet nor also the mail sent is not geeting deliverd to the remote internet users , but when checked the var/log/maillog iam able to see the incoming mail from the internet user but the same is not geeting on the mail account inbox , please help

Answer : sendmail smtp in linux

problem was with the resolving ( dns) once this is fixed  the issue is solved