Zimbra SASL Errors – Users unable to authenticate

Posted Leave a commentPosted in Linux, Tech

If you’re observing errors on your Zimbra servers’ mail-log similar to the one below, and your users are reporting password prompts on ‘sending’ e-mails. Nov 24 17:12:07 areto postfix/smtpd[5528]: warning: SASL authentication failure: cannot connect to saslauthd server: Connection refused Run the following commands under your servers root user. ln -s /var/spool/postfix/var/run/saslauthd /var/run/saslauthd zmcontrol restart […]

Networking Tips – Blocking Whatsapp On Cisco IOS/Mikrotik ROS

Posted Leave a commentPosted in Tech

Sometimes you may need to configure filtering of whatsapp at a customer network. Here is a quick & painless method. Mikrotik RouterOS Step #1 – Configure the Address List /ip firewall address-list add address=31.13.64.51 list=whatsapp add address=31.13.65.49 list=whatsapp add address=31.13.66.49 list=whatsapp add address=31.13.67.51 list=whatsapp add address=31.13.68.52 list=whatsapp add address=31.13.69.240 list=whatsapp add address=31.13.70.49 list=whatsapp add address=31.13.71.49 […]

Postfix SMTP Sender Policy Routing

Posted Leave a commentPosted in Email, Tech

Recently, I had need of setting up a postfix “smtp router” to distribute mail from various users among a cluster of outbound relays (on unique exit IP’s, with difference QoS policies applied) Part of the functionality that was desired was the ability to route “priority” users and “bulk” users via different cluster members. Step 1 […]

PRTG Postfix Queues SSH Script

Posted 2 CommentsPosted in Email, PRTG

Here is the script i created to output postfix queue statistics to PRTG via an advanced SSH Sensor. Copy it to /var/prtg/scriptsxml and chmod +x #!/usr/bin/env perl # postfix queue/s size # author: Keith Rose use strict; use warnings; use Symbol; sub count { my ($dir) = @_; my $dh = gensym(); my $c = […]