Solved

Cisco Ironport - Long delivery time for messages manually released

Posted on 2016-10-11
4
13 Views
Last Modified: 2016-11-05
Model - Cisco Ironport C370
OS - 9.7.2-047

Dear Experts

Please can someone assist me.

On my Cisco Ironport I quarantine all emails containing zip files due to company policy.

Recently when I manually release an email it takes forever to come through. Almost 90 mins. This never used to happen before.

Any ideas?
0
Comment
Question by:TTAF4
  • 2
4 Comments
 

Expert Comment

by:John Sam George
ID: 41838030
Check the Receive connector if you are using Exchange first. Then check the IIS in your CAS servers.
1
 
LVL 17

Expert Comment

by:Malmensa
ID: 41839431
Could be greylisting in use somewhere. This is an antispam technique.

Basically, when email is sent from a new user, the SMPT server responds with a "temporary error", and makes the sender retry. After a delay, (which could be 90 mins), it accepts the email, and in future, applies no delay. This is effective, since spammers nearly always give up on the first attempt, while legitimate email nearly always makes multiple attempts.

More here:
https://en.wikipedia.org/wiki/Greylisting
1
 

Accepted Solution

by:
TTAF4 earned 0 total points
ID: 41867874
Turns out that this was an issue on the ironport itself and could only be resolved by Cisco
0
 

Author Closing Comment

by:TTAF4
ID: 41875255
I had to log a call with Cisco. Only they could resolve this issue.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Network Infrastructure for Branch Office 16 88
ASA Deny No Connection PSH ACK, Traffic is dropped 10 65
VLAN Tagged traffic 2 35
CISCO ATA 190 using PRI DID number 6 20
This is about downgrading PIX Version 8.0(4) & ASDM 6.1(5) to PIX 7.2(4) and ASDM 5.2(4) but with only 64MB RAM and 16MB flash. Background: You have a Cisco Pix 515E which was running on PIX 7.2(4) and its supporting ASDM 5.2(4) without any i…
I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.
A company’s greatest vulnerability is their email. CEO fraud, ransomware and spear phishing attacks are the no1 threat to a company’s security. Cybercrime is responsible for the largest loss of money to companies today with losses projected to r…

914 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now