Email on VPS using CentOS 5.4 only works if sent and received within same domain?!?

[dalearyous]

so if bob@domain1.com sends an email to sam@domain1.com the email works. but if someone sends an email from lets say gmail to bob or sam the message never arrives and bob and sam can't send out email.

help!?

 

[Crusty]

Check your /var/log/mail.{log,warn,err} to figure out what's going on. How is mail setup on the box? Are you using an external relay server or a local SMTP server?

 

[dalearyous]

this is probably caused by the fact that i changed what port emails are used on the master.cf in postfix folder, it reads as follows:

# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ==========================================================================
#smtp inet n - n - - smtpd -o content_filter=spamassassin
587 inet n - n - - smtpd

i commented out the first line because i wanted to use port 587 instead because verizon blocks port 25 and i need this email to work in outlook. when i did this email started working but only locally. not sure what to do

if i put the file back to its original, email starts working again like normal, but only in webmail

 

[dalearyous]

ok so this works:

but i have no idea why?

# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ==========================================================================
smtp inet n - n - - smtpd -o content_filter=spamassassin
submission inet n - n - - smtpd
-o smtpd_sasl_auth_enable=yes
-o smtpd_client_restrictions=permit_sasl_authenticated,reject