Long time no technical post; here’s a solution to a small but frustrating error I saw today.
I got this while sending a mail with a huge attachment:
postdrop: warning: uid=1000: Illegal seek
sendmail: fatal: amit(1000): queue file write error
Now this is because postfix (according to their man page) defaults to a 10MB file size limit. Though my attachment was much smaller than that, it was blocked. So I’m guessing the manpage and the real default are out of sync. I set the ‘message_size_limit’ to 15000000 (slightly less than 15MB) in /etc/postfix/main.cf. This worked.
(I use postfix 2.3.3 on Kubuntu.)
>Thank You
>I also thank you.
>I had the same problem / error as you, with a 7.3 MB attachment.
I set the message_size_limit to 0, which presumably gives no limit. That solved the problem for me.
>It should be noted that the message_size_limit is not a file-size limit for an attachment. It’s the maximum size of an entire email message, including headers, text, and mime-encoded attachments.
A typical mime-encoded attachments is encoded with the base64 algorithm, and will then increase 33% in size (3 bytes becomes 4) thus a 7MB file, with headers, and text easily can exceed the 10MB standard limit of postfix.
But nevertheless, increasing the message_size_limit fixes the problem!
Thanks for saving me much hazzle trying to figure out what the error message was all about.
>pesky problem, big hassle, quick solution. Thanks!
>Someone asked for step-by-step instructions. Here they are:
If you have access to the ‘root’ account, do this:
$ su
[Enter password]
# vi /etc/postfix/main.cf
[Use arrow keys to navigate and find the line with ‘message_size_limit’]
[Press ‘i’ to enter edit mode. Change the limit from default to a higher value or ‘0’ for unlimited message size]
[Press ESC to escape edit mode]
[Press ‘:’ then ‘w’ then ‘q’ to write the file and exit]
# exit
[That exits from ‘root’ to normal user]
>legend – thanks for the tip!
>Who knows where to download XRumer 5.0 Palladium?
Help, please. All recommend this program to effectively advertise on the Internet, this is the best program!
>solved the issue this morning, good post!