Re: *.synchro.net bouncing
  By: Dumas Walker to DIGITAL MAN on Sun Jun 20 2021 08:52 am

 > > Thanks for pointing out the USER=0 thing.  That seems to have fixed half
 > > of my problems.  I am able to receive messages now for the echos (and
 > > email)
 > > if they are address to @capitolcityonline.net.  I am still having issues
 > > with @capcity2.synchro.net bouncing emails.  I will have to ask DM about
 > > that. :)
 >
 > Good morning!
 >
 > I seem to be having issues receiving email that is routed to a
 > capcity2.synchro.net address.  The ISP I am sending them from is returning
 > the error below.  It appears that the ISP is generating the error.  I have
 > also included the headers on the returned message.  I have had 3 or 4
 > returned, and one of my users was also complaining about sending mail from
 > another email service that was not arriving here.
 >
 > I thought it might be on this end, but I am able to send/receive emails
 > using my no-ip reflector address and, thanks to hemo, I am now receiving
 > list traffic also.  So my port (587) is open and receiving traffic.  I am
 > also
 > able to telnet to 'capcity2.synchro.net 587' and get a response.

You need to have/use TCP port 25 to receive SMTP mail directly to your BBS.
TCP Port 587 is for SMTP "submissions" which is slightly different.
http://wiki.synchro.net/faq:tcpip#receive_mail
-- 
                                            digital man

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