hello there ,

I know only a little about linux . I have a linux (slackware 2.2.6) and have sendmail 8.9.3 installed as mailserver .

Recently I saw lots of 'timeout waiting input from my-customer-domain ... ' . There are no problem receiving mails from other sites.

I have checked some documents and they said that probably caused by different MTU SIZE or MSS size or icmp messages were dropped by my server .


Anybody can help me to sort this problem out ?
How to check what is the real reason ?


Any message from you will be appreciated.

thanks in advance .

daisy

please tell us a little more about this.

does this do it all the time.

is the config set to allow from this domain.

is the domain 'local'.

double check your firewalls. (including routers).

good luck.

Thanks for your reply.

I can receive mails from all other domains normally, only this one , not local , small size mails ok , but mails with attachments just wont't be received. This situation begun only week ago.

I do not have firewalls .

Any idear ?

did you ever change the MTU SIZE or MSS size?

how about a virus protection program.. is one installed-- could be blocking certain letters with attachments.

good luck.. lettuce know.

I tried change my mss to 576 . The connection between this domain and mine work smooth , but slow(before I change mss size , the connection will be timeout at last).
It taks 30 minutes to receive 4mb.
What else can I try ?

thanks for your message

did you look into whether a virus protection is the culprit...

if not i would move this post to slackware (or repost there) since they may have more insight... i wish i could help more.

mails with attachments just wont't be received. This situation begun only week ago.
Can you provide a trackback of events around that time on both ends?
And check your system and daemon logs for clues.


I do not have firewalls .
Why not?


if not i would move this post to slackware (or repost there)
Actually there's nothing Slack-specific in this question I can see, guess it's more something for Linux - Networking. Crossposting isn't what we would like to see. If you're ready to move just msg a mod.

sorry about that.. i should have worded that differently