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Member
Posts: 4

Incoming port 25

It seems like there are port restrictions implemented since Yesterday. Especialy incoming port25

Frequent Contributor
Posts: 399

Re: Incoming port 25

[ Edited ]

You can't send email do you mean which is outgoing port 25 as incoming is port 110?

 

Sounds like you're using a third party email address rather than @telkom.co.za? 

Member
Posts: 4

Re: Incoming port 25

Nope, meaning incoming smtp port, I run my own smtp server ...

Frequent Contributor
Posts: 399

Re: Incoming port 25

My bad, so the sender's email provider is blocking port 25?

Member
Posts: 4

Re: Incoming port 25

Hi, Nope Telkom Mobile is filtering incoming port 25 from yesterday.

Tested router, port opened and responded.

Basicly I have an SMTP server inside my network, Email is sent to my domain, the data is delivered to my LTE modem on port 25 and then to my smtp server inside my network.

From Yesterday my the data packlets is not reaching my LTE modem on port 25.

Some ISP's restrict port 25, but Telkom Mobile was always unrestricted (until yesterday).

Currently I do not receive emails from outside to my server, outside connection get connection refused ....

Frequent Contributor
Posts: 399

Re: Incoming port 25

Am confused as you say port 25 on your side is blocked but tests open from outside your network?

 

You can only test port 25 on the WAN side from the outside.

 

Maybe time to initiate SSL 465 or 587 with no encpryption?

Member
Posts: 4

Re: Incoming port 25

HI,

 

No, it is blocked from the outside (WAN side) to the inside (LAN side)

Wan ports scan confirm that port 25 is filtered from ths ISP side

 21ftpFiltered0
 22sshFiltered0
 23telnetFiltered0
 25smtpFiltered0
 53dnsFiltered0
 80httpOpen343
 110pop3Filtered0
 111portmapper, rpcbindFiltered0
 135Microsoft RPC servicesFiltered0
 139netbiosFiltered0
 143imapFiltered0
 389ldapFiltered0
 443httpsOpen342
 445SMB directly over IPFiltered0
 587msa-outlookFiltered0
 1025IIS, NFS, or listener RFS remote_file_sharingFiltered0
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