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Beginner

ASA 5505 issue mails with attachement

Hello comunity,

I have an issue with a ASA 5505

we have our mailacconts hosted by our provider, and sends and received mails with POP3 (110) and SMTP (25).

I m opend these ports on my ASA in the global roule.

SW: ASA 8.3(1) ASDM 6.4

To send and receive text and html mails flow very fine! We can recived mails with attachement to .

But we could'nt send mails with attachement.

I found an knowledge base artikel for MS-Outlook.

About the issue and configure more time for an answer from the server. But the problem are again.

i have disabled the esmtp role in the service policy -> inspection default role  but its the same as before.

Now i am unable to find a solution for that issue.

1 ACCEPTED SOLUTION

Accepted Solutions
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Beginner

Re: ASA 5505 issue mails with attachement

Can you post your ASA config?

Regards

View solution in original post

13 REPLIES 13
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Enthusiast

ASA 5505 issue mails with attachement

If u are able to send email without attactment, what i think so there is nothing that is being blocked in firewall. 

Jawad
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Beginner

ASA 5505 issue mails with attachement

You don't understand the issue??

The issue are since we have the ASA in our network.

Before Mails with attachement made no issue and flows very well!!

I think one of the role block the attachements.

But i didn't find witch

Or is it a bug from the ASA Firmware?

Highlighted

Re: ASA 5505 issue mails with attachement

Hello Dietmar,

I do understand your issue and I want you to run some commands so we can determine what is going on,

First of all:

cap asp type asp-drop all circular-buffer

Then try to send an email with an attachment.

show cap asp | include x.x.x.x Your Internal IP Address from where you send the email

show logging | include x.x.x.x ( Your Internal IP Address from where you send the email)

Show run Service-policy

I do agree on something 8.3 is a really buggy version BUT before recommending an upgrade let's get this issue resolved,

Regards,

Julio

Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC
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Beginner

Re: ASA 5505 issue mails with attachement

Hi,

I am not sure if it is a Firmware issue. But i had often Problems with different ASA images. The ASA Image 8.4.(4.1) works really fine.

I would suggest to use this Version.

Sent from Cisco Technical Support iPhone App

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Beginner

Re: ASA 5505 issue mails with attachement

Can you post your ASA config?

Regards

View solution in original post

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Beginner

Re: ASA 5505 issue mails with attachement

Hello Comunity,

thanks for your postings and input!

@ Alessandro: on this link you can find the aktual config!

For all other, thanks for input but this week i am on holiday, so i am not in the office and could'nt check your commands i would do it next week if i am in the office ok!

Thanks, for it!!

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Beginner

Re: ASA 5505 issue mails with attachement

Hello Alessandro!

Here you could find the Config as Attachement!!

Thanks for your help

Re: ASA 5505 issue mails with attachement

what size are the attachment ?, can you try to send a small file like 10kb  and see if you still have to problem... also check the email clients if they are setup to use ssl or not

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Beginner

Re: ASA 5505 issue mails with attachement

The size of the Attachement i have tested are 8 MB

A 10KB Attachement (for Example a clean Word Dokument) have no Problem.

No the ISP use no SSL!

The Ports what used are 25 and 110.

The Issue are since we have used the Cisco ASA.

Before we have a Fortinet with teh same ports and Configuration and it runs pipi fine.

On the Fortinet we had a Overtention, so it is died!

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Beginner

Re: ASA 5505 issue mails with attachement

Hi,
i think it's not an access-list problem.
if you don't need ipv6, try to disable it from int vlan 1 and then issue the command "no fixup protocol smtp 25"
let me know.

Regards

Sent from Cisco Technical Support iPad App

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Beginner

Re: ASA 5505 issue mails with attachement

Hi,

now i find a solution!

I Flashed the latest Firmware on ASA 9.1 and ADSM 7.0

now the mails with Attachement Flushes !

But as this time I have another issue, I could'nt reach the Firewall form internal network with ADSM on their Ip-Adress.

Ping and tracerout resolve the correct adress..

(Fehlercode: ssl_error_no_cypher_overlap)

Thanks

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Beginner

Re: ASA 5505 issue mails with attachement

hi Dietmar,
follow this guide to troubleshoot ASDM connection problems :

https://supportforums.cisco.com/docs/DOC-13012

Hope this helps

Sent from Cisco Technical Support iPad App

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Beginner

Re: ASA 5505 issue mails with attachement

HI,

Can I configur ASA 5510 for multiple IPsec connection?

Hardware:   ASA5510, 1024 MB RAM, CPU Pentium 4 Celeron 1600 MHz

Internal ATA Compact Flash, 256MB

BIOS Flash Firmware Hub @ 0xffe00000, 1024KB