how are you stopping this? (mailq full of connection refused)

[Larry Vaden [Permanent Link]]

How are you stopping your mailq from filling with "connection refused."?

A straight 'telnet host.example.com 25' yields an immediate
"connection refused.", e.g.,

[root@mx1 postfix]# telnet 72.46.152.152
Trying 72.46.152.152...
telnet: connect to address 72.46.152.152: Connection refused
telnet: Unable to connect to remote host: Connection refused

Thanks for the hint/clue.

BTW:  We're reluctant to use sender address verification unless others
recommend it because postfix.org says "It performs poorly under high
load; excessive sender address verification activity may even cause
your site to be blacklisted by some providers."

kind regards/ldv

A glimpse of the problem (typically 5-20K messages in defer/deferred queue):

[root@mx1 postfix]# mailq | grep "Connection refused" | sort | uniq -c
| sort -rn | head -n20
    104 (delivery temporarily suspended: connect to
mail.polsterfindernet.com[64.187.119.66]: Connection refused)
    100          (connect to mail.thatis-great.com[64.187.119.68]:
Connection refused)
     67          (connect to mail.harketonline.com[209.62.245.66]:
Connection refused)
     49      (connect to mx5.happyvalleynights.com[72.46.152.139]:
Connection refused)
     43                (connect to mx4.vernise.com[72.46.136.165]:
Connection refused)
     43      (connect to mx2.happyvalleynights.com[72.46.152.136]:
Connection refused)
     42              (connect to mail7.vernise.com[72.46.136.183]:
Connection refused)
     39            (connect to mail.greatoutletz.com[66.78.54.20]:
Connection refused)
     37        (connect to bounce.jillybands.info[194.110.67.180]:
Connection refused)
     35              (connect to mail.keybizsite.com[66.78.54.85]:
Connection refused)
     32          (connect to mx5.affirmthebest.com[72.46.152.134]:
Connection refused)
     31          (connect to mx4.memberrewardz.com[72.46.152.143]:
Connection refused)
     31              (connect to mail3.vernise.com[72.46.136.179]:
Connection refused)
     31             (connect to mail11.vernise.com[72.46.136.187]:
Connection refused)
     30                (connect to mx9.vernise.com[72.46.136.170]:
Connection refused)
     30      (connect to mx4.happyvalleynights.com[72.46.152.138]:
Connection refused)
     29          (connect to mx5.memberrewardz.com[72.46.152.144]:
Connection refused)
     28        (connect to mx3.mypurpleclovers.com[72.46.152.147]:
Connection refused)
     28        (connect to mx2.mypurpleclovers.com[72.46.152.146]:
Connection refused)
     27             (connect to mx3.pathconnex.com[72.46.152.152]:
Connection refused)