I have a coworker who receives email from this address 
customerservice@4over.com    when communicating with their customer service personnel.
    However when their system auto sends us a shipping confirmation     email from the same address my coworker doesn't receive that email.
    The response from 4Over's IT department sent us this:    
    We are seeing no direct indication that the email is not being     delivered. Based on the test below we are not being rejected     outright. What I am noticing is the email is being redirected from     the SMTP server to some other location.
    In either case the client needs to check their local spam folder.     They also need to check their email providers web interface spam     folder. It is not uncommon for the online folder to not sync with a     the local client..    
    HIDDEN@mtp2 ~]# telnet 
mail.ehowe.com    25
    Trying 74.142.44.242...
    Connected to 
mail.ehowe.com.
    Escape character is '^]'.
    220 
ehowe.com SurgeSMTP (Version     6..1c-1) 
http://surgemail.com    HELO 
4over.com    250 
ehowe.com. Hello 
4over.com (69.237.62.62)
    MAIL from:
    250 recipient ok, redirecting message
    QUIT
    221 Command QUIT, disconnecting
    Connection closed by foreign host.
    ==============================================    
    This is what my surgemail logs say and I'm sure on how to decipher     them.    
    23 12:19:59[608789] Rcpt 69.237.62.62     
<customerservice@4over.com?> <howeHIDDEN@we.com> 0  ""
    23 12:19:59[608789] Forward 69..237.62.62     
<customerservice@4over.com?> <howeHIDDEN@we.com> 0      "[69.237.62.62] Auth response redirected email to     (|respond=respond.rsp&daily,$user)"
    23 12:19:59[608789] SPF 69.237.62.62     
<customersHIDDEN@4over.com?> <howe.sc@ehowe.com> 0      "spam_block=false"
    23 12:20:10[608789] Rejected 69.237.62.62     
<customerservice@4over.com?> |respond=respond.rsp&daily 0      "[69.237.62.62] No DATA command sent"
    23 12:20:10[608789] Rejected 69.237.62.62     
<customerHIDDEN@@4over.com?> <howe.sc@ehowe.com> 0      "[69.237.62.62] No DATA command sent"    
    23 14:16:25[609110] Rcpt 165.254.20.105     
<customerservice@4over.com> <howe.sc@ehowe.com> 0  ""
    23 14:16:25[609110] Forward 165.254.20.105     
<customerservice@4over.com> <howe.sc@ehowe.com> 0      "[165.254.20.105] Auth response redirected email to     (|respond=respond.rsp&daily,$user)"
    23 14:16:25[609110] Received 165.254.20.105     
<customerservice@4over.com> <howe.scHIDDEN@com> 2685     
<20130723181622HIDDEN@601A0@hawk.4over.com> "Body has arrived,     Relay=islocal, nrcpt=2, s=[4over Customer Service]"
    23 14:16:25[609110] Aspam 165.254.20.105     
<customerservice@4over.com>    <|respond=respond.rsp&daily> 2685     
<20130723181622HIDDEN@601A0@hawk.4over.com> "notrust *****:     5.2 sd=5.2  1.5(Received:for multiple) 0.9(X-myrbl:Color=blue)     -0.0(X-LangGuess:English) [sig=2] [nnot=0,nis=0,nb=0,0.0]"
    23 14:16:25[609110] Sent 165.254.20.105     
<HIDDEN@erservice@4over.com> |respond=respond.rsp&daily     2685 
<20130723181622.6C2611601A0@hawk.4over.com>    "[165.254.20.105] Running responder respond.rsp&daily"
    23 14:16:25[609110] Spam 165.254.20.105     
<cHIDDEN@service@4over.com> <howe.sc@ehowe.com> 2685     
<20130723181622.6C2611601A0@hawk.4over.com> "[165.254.20.105]     SpamDetect"
    23 14:16:25[609110] Stored 165.254.20.105     
<customerservice@4over.com> <howe.sc@ehowe.com> 2685     
<20130723181622.6C2611601A0@hawk.4over.com> "[165.254.20.105]     Stored locally /var/surgemail/mail.ehowe.com/ic/ff/howe..sc/mdir/new/1374603385.586_67069.ehowe.com"    
    23 14:20:51[609124] Rcpt 74.136.161.51 
<howe.sc@ehowe.com>    <HIDDEN@erservice@4over.com> 0  ""
    23 14:20:55[609124] Sent 74.136.161.51 
<howe.sc@ehowe.com>    <customerservice@4over.com> 19760     
<B5FC7CE6-01D8-4197-87D4-F497B0B22AHIDDEN@e.com>    "[74.136.161.51] Delivered to remote host 74.125.148..10 - 250     Thanks"    
    23 14:36:53[609166] Rcpt 165.254.20.105     
<customerservice@4over.com> <howeHIDDEN@we.com> 0  ""
    23 14:36:53[609166] Forward 165..254.20.105     
<customerservice@4over.com> <howeHIDDEN@we.com> 0      "[165.254.20.105] Auth response redirected email to     (|respond=respond.rsp&daily,$user)"
    23 14:36:53[609166] Received 165.254.20.105     
<cuHIDDEN@ervice@4over.com> <howe.sc@ehowe.com> 1951     
<20130723183651.CFEF11601A0@hawk..4over.com> "Body has arrived,     Relay=islocal, nrcpt=2, s=[4over Customer Service]"
    23 14:36:53[609166] Aspam 165.254.20.105     
<customerservice@4over.com>    <|respond=respond.rsp&daily> 1951     
<20130723183651HIDDEN@601A0@hawk.4over.com> "notrust : -0.6     sd=-0.6  -12.4(X-SpamContent:clean) -3.0(X-myrbl:Color=yellow)     1.5(Received:for multiple) -0.0(X-LangGuess:English) [sig=3]     [nnot=2,nis=0,nb=0,0.0]"
    23 14:36:53[609166] Sent 165.254.20.105     
<HIDDEN@erservice@4over.com> |respond=respond.rsp&daily     1951 
<20130723183651.CFEF11601A0HIDDEN@over.com>    "[165.254.20.105] Running responder respond.rsp&daily"
    23 14:36:53[609166] Stored 165.254.20.105     
<HIDDEN@erservice@4over.com> <howe.sc@ehowe.com> 1951     
<20130723183651.CFEHIDDEN@0@hawk.4over.com> "[165.254.20.105]     Stored locally /var/surgemail/mail.ehowe.com/ic/ff/howe.sc/mdir/new/1374604613.586_67143.ehowe.com"
    Cpu time used 0.0666 cpu seconds    
    ==============================================    
    Does this look like it's a problem with my server delivering the     email to my coworker? I'm not sure why it is saying Forward and     redirecting as 4Over's IT department has pointed out.    
    Thanks for any insight.