Re: Postfix timeout after data MTU size question

2016-09-22 Thread Joseph Thibeault
I did some research on that. This server is on Microsoft azure and their virtual networks do have a firewall built in which inspects inbound packets. There isn't a firewall on the VM itself. What type of setting should I be looking for in the firewall? On Thu, Sep 22, 2016 at 2:08 AM Harald Paulsen

Re: Postfix timeout after data MTU size question

2016-09-22 Thread Joan Aymà
In azure you cannot change that settings to acomodate your custom MTU. AFAIK you must use the dafault MTU 1500. El 22/09/16 a les 12:23, Joseph Thibeault ha escrit: > I did some research on that. This server is on Microsoft azure and > their virtual networks do have a firewall built in which insp

Re: Postfix timeout after data MTU size question

2016-09-22 Thread Wietse Venema
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 an

Difficulties in compiling postfix 3.1.2 on AIX

2016-09-22 Thread anant
Hi List, I am trying to compile postfix 3.1.2 on AIX, but getting following error. [src/master] /opt/freeware/bin/gcc -I. -I../../include -DUSE_TLS -DUSE_SASL_AUTH -DUSE_CYRUS_SASL -DHAS_LDAP -DHAS_PCRE -I/opt/freeware/include/openssl -I/usr/local/cyrus-sasl/include/sasl -I/opt/freeware/include

Re: Difficulties in compiling postfix 3.1.2 on AIX

2016-09-22 Thread Wietse Venema
an...@isac.gov.in: Content-Description: Plaintext Message > Hi List, > > I am trying to compile postfix 3.1.2 on AIX, but getting following error. > > [src/master] > /opt/freeware/bin/gcc -I. -I../../include -DUSE_TLS -DUSE_SASL_AUTH > -DUSE_CYRUS_SASL -DHAS_LDAP -DHAS_PCRE -I/opt/freeware/inclu

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 you. I've ran the tcpdum

Re: Postfix timeout after data MTU size question

2016-09-22 Thread Viktor Dukhovni
> On Sep 22, 2016, at 3:07 PM, Joseph Thibeault wrote: > > https://dl.dropboxusercontent.com/u/3432879/postfixdump.zip That PCAP file contains no SMTP sessions. Send a PCAP file containing a single problem SMTP session. -- Viktor.

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 Thibeault wrote: > > > > h

Re: Postfix timeout after data MTU size question

2016-09-22 Thread Wietse Venema
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. As mentioned in my earlier reply, http://www.postfix.org/DEBUG_README.html Please review a captured s

Re: Postfix timeout after data MTU size question

2016-09-22 Thread Viktor Dukhovni
> On Sep 22, 2016, at 3:40 PM, Joseph Thibeault wrote: > > 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. 1. Start the capture on the correct interface before (re-)