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I am having trouble port forwarding port 587 in ASUSWRT

H

Han678

Junior Member
I need to forward this port on just one of my families computers so that they can send email from their old account with Thunderbird.
In the settings I have put 587 in the range and the port and given the right ip address of the NATed computer but it does not work.
I don't know what I am doing wrong.
 
Forwarding a port for outbound traffic? You have something else configured wrong. Unless I've got my head up my you-know-what which has been known to happen before.

What is it, Google, Hotmail, Yahoo, Comcast, what?
 
Port 587 would be used for Outgoing Mail (usually POP and maybe IMAP) by a lot of major email providers. If he can not use the email through his client (thunderbird) then it is likely a router or individual computer issue. If all of his computers have the same issue, then it is either a router problem or the needed port is being blocked by his ISP
 
bruceb said:
Port 587 would be used for Outgoing Mail (usually POP and maybe IMAP) by a lot of major email providers. If he can not use the email through his client (thunderbird) then it is likely a router or individual computer issue. If all of his computers have the same issue, then it is either a router problem or the needed port is being blocked by his ISP
Click to expand...
Not arguing but more than likely it is some of the more nuanced settings in the email client. They have to be right or nothing is going to happen. He can't figure out how to port forward which tells me that he has too little knowledge to lock down a router. Now, if he's running a third party firewall, that could be blocking it.

I configure email clients for friends and relatives fairly often. The specific settings must be known and because they change from time to time, it can be difficult finding the right ones. It often becomes a trial and error process.

Does the server require authentication.
SSL or TLS, which is related to the port used.
Some email clients will automatically change settings depending on port requirements but other settings must be changed, etc.

This is why I asked if it's Comcast, Google, etc. The old account statement concerns me too. Is the account active? The OP isn't telling us if it is receiving email or can receive email.

The following link could be very helpful to the OP.

http://www.canyouseeme.org/
 
I agree, email settings for Outlook or Thunderbird can be quite a challenge. And yes, various ISP email services use various types of settings as you mentioned. That link is nice, but my router is set to deny incoming pings. So it will not see my computer when I test using it.
 
587 is a standard STARTTLS SMTP port, as in for a destination. You should not need to forward this. As others were suggesting, check out the settings in Thunderbird under Outgoing Server (SMTP) and make sure that lines up with the e-mail host's settings.

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