Starting Tuesday 9/26/17 I was unable to send emails using Thunderbird (SMTP server mail.twc.com). Turned out my email password was no longer valid. My password had a special character in it, and TWC now allows only letters and digits. After a password reset I could log into the mail.twc.com server, but still could not send emails. My TWC assigned email address is firstname.lastname@example.org, but I don't use this address. I have my own email address with my own domain name (email@example.com). I have always used this email address as my "From" address in Thunderbird, and it has worked for many years. Starting Tuesday it is rejecting my sent emails saying the email address is wrong. I can only send emails if I set my email address to the roadrunner address. I really need to be able to use my own email address, as I have a small business on the side. TWC customer support acknowleges that this is a problem with their servers, but they have no estimate of when it might be fixed. How can I escalate this problem to a higher priority? I suspect a LOT of people can no longer use their own email addresses! I need a fix now.
There are multiple threads on this forum about this. Here is what I found that is the root cause of the problem.
I found yesterday that I also was experiencing this same issue. This morning after some searching I was able to resolve in my mail server. What Spectrum has changed is that they are looking for the MAIL FROM Reverse-Path or Return-Path to be is the Spectrum login and not another email address. This is a function described in the SMTP RFC 5321 (https://tools.ietf.org/html/rfc5321). I found in Mercury Mail that I can set a Forced SMTP Sender with that login and it works. It does not affect the reply-to or whom the email came from.
I primarily use Thunderbird as my client and could not find a way to specify this in the setting to use the internal SMTP engine. Not sure about other clients, some may support this setting. I would say that Spectrum needs to change back whatever setting they recently changed, as it will be a large problem for many users that have email addresses other than their Spectrum address.
I hope that this helps to clarify the issue in more detail.
LOGIN to server smpt-server.tmcny.rr.com failed... again
I am no geek on these issues, but clearly this started w TWC/spectrum while I was away for 2 weeks. Funny thing was, I could log on to Spectrum directly in late Sept and use their clunky email service, and even send out a few simple emails. Now home on biz laptop and with Thunderbird , : ok to receive messages, open attchments, email to embedded links.. however can not send nor reply . After calling a bright TW/charter tech csr he took little time in explaining a recent upgrade results w not only mozilla tbird but many 3rd party email services and they were 'working' on it. Thanked him, and would monitor this. I'll use the TW spectrum email server if necessary ( ugh, a most akward address book, and difficult to reply to a new contact) or I'll confuse my clients by using gmail .. My tw/chrtr survey response was: if this is a 'problem' being "fixed" .. why no mass mailing from a media giant, senistive about their fragile image.... for example , If FedEx sees a tree fall in the road in British Columbia, they Email the freakin world about a potential service interruption, ..It's not the glitch, it's the repeated pain of discovery and work around that forces us , the lazy, to find new & better solutions.
I can confirm I also have been hit by this. For YEARS with TWC and up until recently on Spectrum I've had a different reply-to email address to maintain a common email address across different work and personal accounts.
Basically it boils down to this. Until this change happened you could have a reply to address in Apple Mail or Outlook like:
and authenticate with your TWC/Spectrum credentials:
But after this change if the reply from is not exactly the same as firstname.lastname@example.org it fails to send.
So I’m receiving emails, but sending fails with invalid username password incorrect or cannot connect to port 587 or connection timeout. Customer support says they are aware of this. Got automated call saying it’s fixed, but still can’t send. Iasked for credit, but they say email is free.
This magically started working again today, just as it has worked for many many years before.
I can again send mails from custom domain. email@example.com as the reply to address in Outlook 2010 and Apple Mail. Again.