I found several entries as following up on running postqueue -p, where 212.119.64.138 is my actual mailbox server
(delivery temporarily suspended: conversation with fmbx01.cyberia.net.sa[212.119.64.138] timed out while performing the EHLO handshake Whereas threre is no problem up on telnet to 212.1119.64.38 : 25 [root@mailgate5 ~]# telnet 212.119.64.138 25 Trying 212.119.64.138... Connected to FMBX01.cyberia.net.sa (212.119.64.138). Escape character is '^]'. 220 fmbx01.cyberia.net.sa ESMTP CommuniGate Pro 5.3.12 is glad to see you! quit any help would be highly appreciated. ejaz -- This message has been scanned for viruses and dangerous content by cyberia MailScanner, and is believed to be clean.