Re: Postfix timeout after data MTU size question

2016-09-22 Thread Joseph Thibeault
Ah sorry. Pardon my inexperience. Do you have an example of how to ensure that it contains a single smtp session? When I record I just specify eth0 which grabs everything. On Thu, Sep 22, 2016 at 3:24 PM Viktor Dukhovni wrote: > > > On Sep 22, 2016, at 3:07 PM, Joseph Thibeau

Re: Postfix timeout after data MTU size question

2016-09-22 Thread Joseph Thibeault
I've ran the tcpdump and imported it into wireshark but I'm not exactly sure what I'm looking at. Attached is the dump. Thank you for any insight! https://dl.dropboxusercontent.com/u/3432879/postfixdump.zip On Thu, Sep 22, 2016 at 3:05 PM Joseph Thibeault wrote: > Thank

Re: Postfix timeout after data MTU size question

2016-09-22 Thread Joseph Thibeault
arald Paulsen wrote: > is there an old cisco pix firewall, or any other firewall with packet > inspection involved? > > > Harald > > Sent from my iPad > > > On 22. sep. 2016, at 06.24, Joseph Thibeault wrote: > > > > We use postfix as a mail queue / sen

Postfix timeout after data MTU size question

2016-09-21 Thread Joseph Thibeault
We use postfix as a mail queue / sending service in one of our applications. This application generates emails with PDF attachments. Some of the emails with PDFs get sent fine, but others seem to cause a "timeout after DATA" error. Through reading online, I've seen answers such as adjusting the MT