New Poster
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8 Messages
Can't send email from outlook
Starting a couple days ago, Outlook stopped sending emails for my comcast.net account. I can still receive emails. I can also ping the port at smtp.comcast.net:465. It seems my attempt to connect to the port is being rejected by the server. Password is correct (am receiving emails).
Accepted Solution
Official Solution
Zeek69
New Poster
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8 Messages
16 days ago
Ok, so I setup the Comcast account again in outlook. It sent and received fine. Deleted the new account, entered new password again in old account, and now it seems to work.
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rte3424
New Poster
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8 Messages
7 months ago
And now, magically, it is all working correctly again.
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LR31
Visitor
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4 Messages
7 months ago
Can't send email through Outlook on Xfinity account. Works at night then not during day. Six straight days now!
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rte3424
New Poster
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8 Messages
7 months ago
It is only outlook, and only if it is through my home network on all devices using outlook (e.g. my wife's laptop using her account with outlook). If I connect my laptop to my phone hotspot, then it works. I have a fixed IP for my ISP, and Comcast doesn't like something about it.
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LR31
Visitor
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4 Messages
7 months ago
I can log on to my Xfinity email account on line and can send emails without a problem.
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user_x92ka8
15 Messages
6 months ago
This is a problem at the comcast.net end. Any email client is affected. There appears to be an authentication problem when the email client goes to send an email (via port 465). Outlook reports a "connection to the server was interrupted" error. Android email client just reports "Couldn't send email". Another weird thing - I tried deleting my comcast.net account on my phone and re-adding it back in during the day when this problem was occurring. I couldn't add back the comcast.net account - some cryptic "server authentication" error. A few hours later in the evening, I could add in the account just fine and I could also send emails from my comcast.net account.
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LR31
Visitor
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4 Messages
6 months ago
Still can email during day, night works fine. Going on a couple weeks now.
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KG24Home
1 Message
6 months ago
Same here! Incoming works fine out going mails do not from outlook. My phone, on xfinity web works just not outlook. Checked all ports for SMTP but still nada. Comcast at this funny games with smtp. Sounds like some one is messing with email setting at the company and not just coming clean admit fault and FIX IT!!
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Anon636749
Regular Visitor
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6 Messages
6 months ago
I have had a similar problem since last week. Still seem to be unable to send from my Exchange/Outlook account Comcast email. When I couldn't send to Comcast email, I delayed writing a blog I send out once a month, because I thought it was a Microsoft and Apple problem. Did not realize it was related to Comcast. Have you found any way to correct this? I have been changing passwords, deleting and re-installing accounts all and talking to Apple and GoDaddy.com. Please let me know if you have found a solution. Thank you.
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kvollman
Visitor
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1 Message
6 months ago
I am having this as well Says your server does not support the encryption method. Contact your mail server admin or ISP for additional assistance
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user_x92ka8
15 Messages
6 months ago
I have worked with XfinityAlex and have discovered my problem. This may not apply to others, but it might. In my case, we had a laptop on which we configured Windows Mail (not Outlook) with one of our 3 comcast.net email accounts. This was 18 months ago. The next day we installed Microsoft 365 and configured Outlook with the same email address. We never used Windows Mail again. A few weeks ago, one of our family members mistakenly brought up Windows Mail. This had an old, obsolete password for the comcast.net email address that was configured in it. When he realized he meant to bring up Outlook instead of Windows Mail, he neglected to bring Windows Mail down. He's not good about powering down his computer, so for several weeks, Windows Mail has been trying to sign into comcast.net email with an 18-month-old password. Xfinity has rules that when there are too many failed signons to a comcast.net account, all the email address in that account, from that network, are disabled for a period of time. This is what was causing my inability to send emails from my other two comcast.net accounts but only from my home Spectrum ISP. Xfinity's rules are "Too many failed signon attempts from this account, from this particular network, and I'll suspend all the emails in that account from sending emails - for some period of time".
I suggested to Xfinity that they provide some kind of notification to the account owner when this situation happens, but I'm not sure what a reasonable notification approach might be - that's up to them.
In any case, my problem was a minimized Windows Mail email client trying continuously to sign on to a comcast.net account, failing, and Xfinity suspending my email sending ability for some number of hours because of that. Technically, my fault, and I am sufficiently contrite ;-) but it would have been good to have some notification from Xfinity that this was happening.
Good luck to the rest of you with this problem. I'd suggest you first look at any device that might have a comcast.net email account configured in an email client and make sure it's got updated credentials - or just remove the account if you are no longer using that email client.
And thank you @XfinityAlex for your patient help in resolving this issue for me.
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user_1ij10x
5 Messages
6 months ago
Thank you for relating this solution. I have tried it, and we'll see if it works. I deleted Microsoft Mail.
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LR31
Visitor
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4 Messages
6 months ago
Sad to report, everything was working normal for a week. Now back to no outgoing mail can be sent during day. Ugh!
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Anon636749
Regular Visitor
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6 Messages
6 months ago
I'm not sure if it is because Apple came out with an update within the last few days or not. But suddenly I can send from Outlook (or
Exchange) to Comcast and vice versa. Something changed, and I am happy about that. Just wanted to report back and say the problem seems to be solved.
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magnuson_mn
2 Messages
5 months ago
Was experiencing this sending issue as well. I was always able to receive in Outlook (windows PC), but not send. Would receive the error messages that others have shared above (also see my screenshot below from the Outlook error). When trying to update the outgoing port value in Outlook configurations, the change couldn't complete as it couldn't establish a secure connection.
I could both send and receive through Xfinity.com's web mail as well as my email client on iPhone. Trying all the different work arounds and different ports mentioned above and in articles linked above didn't solve the issue, but I was able to find a solution that allowed sending to start working from Outlook on my PC.
I run Norton on my PC and the Norton VPN was set to auto-start and was running. I tried turning off the VPN and then Outlook was able to complete the configuration and send email. So, Xfinity is not liking something related to when the VPN is up and running. VPN location is set to Auto, so not sure where Norton was connecting to, or if Xfinity isn't allowing the connection because something is hidden by the VPN tunnel that it wants to see/inspect or know before allowing the connection, but that was my solve.
(edited)
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