BinaryJob
asked on
sendmail: Time Out
Hello, experts!
Recently, I recv'd some complaints from various user of mine that some of there senders cannot send an e-mail to our site. What is confusing, is that I would say that 5% of senders can't. Went to www.dnsstuff.com and checked my e-mail and got the result below:
mail1.XXXX.com. - 64.xxx.xx.xx [Could not connect: Could not receive data: Operation timed out.]
[Note that if your mailserver takes over 30 seconds to respond, our test will timeout, even though real mailservers will wait longer]
Ran ethereal on my desktop and ran telnet on my e-mail box and discoverred that it does take 40.189 sec for SMTP to begin. Time was after the handshake frame to when SMTP kicked in. Checked another e-mail server and it was way slower. I am running sendmail with the latest patch from RedHat. Does anybody have any clue as to what is going on?
As always, thank you! In advance for your time on this matter.
Recently, I recv'd some complaints from various user of mine that some of there senders cannot send an e-mail to our site. What is confusing, is that I would say that 5% of senders can't. Went to www.dnsstuff.com and checked my e-mail and got the result below:
mail1.XXXX.com. - 64.xxx.xx.xx [Could not connect: Could not receive data: Operation timed out.]
[Note that if your mailserver takes over 30 seconds to respond, our test will timeout, even though real mailservers will wait longer]
Ran ethereal on my desktop and ran telnet on my e-mail box and discoverred that it does take 40.189 sec for SMTP to begin. Time was after the handshake frame to when SMTP kicked in. Checked another e-mail server and it was way slower. I am running sendmail with the latest patch from RedHat. Does anybody have any clue as to what is going on?
As always, thank you! In advance for your time on this matter.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
Anfi!
It was one of the RBL's! I temporarily removed all of them and sure enough, mail got through. Question, I have a few of them that I use, how can I test to make sure that they are working? Better yet, which is failing?
Thank you!
It was one of the RBL's! I temporarily removed all of them and sure enough, mail got through. Question, I have a few of them that I use, how can I test to make sure that they are working? Better yet, which is failing?
Thank you!
Write a simple test script (e.g. in perl) to monitor responce times of RBLs you use.
For medium minus mail sites one check per day and manual sendmail reconfiguration in case of problems should be sufficient (IMHO).
For medium minus mail sites one check per day and manual sendmail reconfiguration in case of problems should be sufficient (IMHO).
ASKER
Thanks for the advise. Will check recommendation and will get back to you. Again, thank you!