Question Can't send emails with new ISP

[In2Photos]

Recently I had fiber installed at my house. They provided a Nokia router/ONT/modem. I had them put it in bridge mode and disabled the wireless since I have my own TP Link Deco mesh system. When I am connected to the new ISP I can not send emails from my email client, Outlook (classic, not the new one). I still have my old ISP (Spectrum cable) service going as I didn't want to get rid of it until I was happy that the fiber was working well since it is new to the area. I do work from home a lot so I need it to be reliable.

If I connect my work laptop to my old ISP or my cell phone's hot spot I can send emails (and receive). When I connect to the fiber I can receive, but not send. I have tried multiple ports, 25, 587, and 465 and have the same results no matter what. The ISP, of course, says it is not on their end, despite everything working fine with my other options. Strangely enough my home UnRAID server is set up to send daily notification emails using GMAIL and port 587. That works fine.

Anyone have any ideas what I can try or tell the new ISP? I'm at a loss as to why this doesn't work.

 

[JackMDS]

I think that the old Outlook has now difficulties in its security acceptance and your new ISP has a btter more secure email deliver system.

As an example, using Verizon FIOS, if i try to send email from old outlook to gmail addresses there is no problem. On the other hand I have fs freinds that are University proffessors and if I try to email to them the University email servers will refuse to take it.

I think that the solution is switch to other, newer email application.

 

[bba_tcg]

Recently I had fiber installed at my house. They provided a Nokia router/ONT/modem. I had them put it in bridge mode and disabled the wireless since I have my own TP Link Deco mesh system. When I am connected to the new ISP I can not send emails from my email client, Outlook (classic, not the new one). I still have my old ISP (Spectrum cable) service going as I didn't want to get rid of it until I was happy that the fiber was working well since it is new to the area. I do work from home a lot so I need it to be reliable.

If I connect my work laptop to my old ISP or my cell phone's hot spot I can send emails (and receive). When I connect to the fiber I can receive, but not send. I have tried multiple ports, 25, 587, and 465 and have the same results no matter what. The ISP, of course, says it is not on their end, despite everything working fine with my other options. Strangely enough my home UnRAID server is set up to send daily notification emails using GMAIL and port 587. That works fine.

Anyone have any ideas what I can try or tell the new ISP? I'm at a loss as to why this doesn't work.

Are you trying to use the Spectrum outgoing email servers or the new fiber servers?

 

[bba_tcg]

I think that the old Outlook has now difficulties in its security acceptance and your new ISP has a btter more secure email deliver system.

As an example, using Verizon FIOS, if i try to send email from old outlook to gmail addresses there is no problem. On the other hand I have fs freinds that are University proffessors and if I try to email to them the University email servers will refuse to take it.

I think that the solution is switch to other, newer email application.

Your domain has probably been blacklisted by the University email servers. This is a common issue with universities. I run into the same thing. If I use gmail, the university recipients get the email. If I use the domain I have with Network Solutions, the email gets bounced.

 

[In2Photos]

I think that the old Outlook has now difficulties in its security acceptance and your new ISP has a btter more secure email deliver system.

As an example, using Verizon FIOS, if i try to send email from old outlook to gmail addresses there is no problem. On the other hand I have fs freinds that are University proffessors and if I try to email to them the University email servers will refuse to take it.

I think that the solution is switch to other, newer email application.

I saw a mention of something similar. But rather than testing that theory with no way to revert back easily I downloaded Mozilla Thunderbird today to test and see if it would work. I couldn't get it to login to the servers regardless of what settings or ISP I used. Which is really weird.

Are you trying to use the Spectrum outgoing email servers or the new fiber servers?

So my work uses Spectrum Business for our internet and email services. So technically I am still trying to use the Spectrum servers since that hasn't changed.

 

[bba_tcg]

I saw a mention of something similar. But rather than testing that theory with no way to revert back easily I downloaded Mozilla Thunderbird today to test and see if it would work. I couldn't get it to login to the servers regardless of what settings or ISP I used. Which is really weird.


So my work uses Spectrum Business for our internet and email services. So technically I am still trying to use the Spectrum servers since that hasn't changed.

It's very possible that your new fiber service isn't communicating well with Spectrum. You should be able to use the outgoing server for the fiber Internet while still using your Spectrum email address.

Edit: it's easy enough to try and also easy to revert if it doesn't work.