why is vtext no loger working from mail server?

Our server has recently experienced this problem(2016-11-28). [Branched from an earlier post] We use postfix to send email. How can we find out if our IP is being blocked and how to unblock it ?

Here is an example mail.log message with the phone number Xed out. I can privately provide the actual message with phone number, but not on this public site.

Nov 28 13:23:51 *myserver* postfix/qmgr[30562]: F2D4847BA9: to=<XXXXXXXXXX@vtext.com>, relay=none, delay=286868, delays=286868/0.05/0/0, dsn=4.0.0, status=deferred (delivery temporarily suspended: host smtpin02.vzw.a.cloudfilter.net[52.36.60.220] refused to talk to me: 554 vzw-ibgw-6003a.stratus.cloudmark.com cmsmtp ESMTP server not available - POL110 - BRWXcHtnuJp18)

Until recently this has been working flawlessly for a decade or longer.

Accepted answers

Verizon_Support

I understand the importance of ensuring these messages reach their destination, monstermac77. I appreciate all the information you have provided. I did some digging, and found we had previously implemented a Sender Policy Framerwork (SPF) policy. If your domain does not have a SPF record, some recipient domains may reject messages from your users because they cannot validate that the messages come from an authorized mail server. SPF records are controlled by the owner of the domain of the sender as showing in the SMTP headers. We recommend customers forward this information to the owner of the message-originating domain who actually sends the message to MDN@vtext.com so they can create a SPF record, which lists the mail servers authorized to send these messages.

AndreaS_VZW
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All comments

lcain0943

I have the same problem. I found that it works from my Linux server (RedHat 5) but not from a Windows 2012 R2 server with Whats Up Gold. As an experiment from the Linux I telnet smtpin01.vzw.a.cloudfilter.net. 25 and type Sendmail command and got a text. When I tried from the Window server I connect but get "554 vzw-ibgw-5002a.stratus.cloudmark.com cmsmtp ESMTP server not available - POL110 - BTXRcrx2CW2dg". The same message you are getting. So in my case it seem to be some type of window issue. I also tried from RedHat 7 which uses postfix. I did not work but it is configuration on my end I think. I did contact the Verizon server which send a legit reject message.

It had been working from my windows server up till 11/22 abouts.

monstermac77

We're experiencing the same issue, which started only very recently (11/10, but really ramped up on 11/20). We also have been using the @vtext.com gateway for 4 years without a single instance of this issue, or any others with deliverability, until now. Since 11/10, over 2000 of our messages to Verizon customers have failed because of this. We really need a fix ASAP. Very happy to help troubleshoot.

We're getting back: "550 5.1.0 <[our email]> sender rejected".

To Verizon: I'm happy to provide any specifics you need (the emails we're sending from, the numbers that have failed, the messages we've been sending, etc.) in a private setting.

lcain0943

Hello Monstermac77,

You are getting a different error than we are and I think I know how to fix your issue. I think your issue is the domain name in the email. I tested one of my other services that was Redhat 7 and was using postfix. It had the error you said you are getting " 550 5.1.0 <[user@server].localdomain> sender rejected". I fixed the configuration to have our actual domain instead of localdomain and it work. On postfix you edit mail.cf and add myorigin = [your server].[your domain]. if you are using something else you will need to figure out how to get the domain set.

monstermac77

Hi lcain0943,

Thanks for your response. That's a good thought, but unfortunately our domain configuration is correct (not localdomain). Considering we all started experiencing these issues around the same time and in at least my and haller.r123's case after not experiencing issues for many years, I'm guessing something changed on Verizon's end. Perhaps their spam filtering, considering we're getting rejections from "....cloudfilter.net" which may be from this email filtering service? http://www.mailprotector.com/cloudfilter/

jkthomps97

I'm experiencing the same issue in my domain, and it started about 11/12 or so. Despite being located in Washington state, we are a subsidiary of a Taiwanese corporation, so all our e-mail routes through a mail gateway in Taipei. We figured the problem was that Verizon (or Cloudmark) had decided to block messages form IP addresses in the "Chinese" range. I tried filling out the forms for Verizon and Cloudmark for whitelisting of IP's, but the response I got back was that our IP was not being blocked or spam-filtered. I tried sending an explanatory e-mail to whitelist@verizononline.net, but haven't heard back as of 24 hours later.

If anyone makes a breakthrough on this issue, please post it here so that other e-mail admins googling this problem can find it. I promise to do the same if I stumble on something.

EcovaJosh

I have the same situation. My mail server supplies the following error message:

The last attempt to send the message was at 11/29/2016 10:50:46 AM (UTC-08:00) Pacific Time (US & Canada) and generated the error '451 4.4.0 Primary target IP address responded with: "554 vzw-ibgw-6002a.stratus.cloudmark.com cmsmtp ESMTP server not available - POL110 - BnUNcwEmoSGWs." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts.'.

Seems like vtext.com is forwarding to cloudmark.com but is not providing an enhanced SMTP service to receive the message.

lcain0943

I fixed the POL110 problem. I had some servers that worked and some that did not and I realized that the ones that worked had reverse DNS. I had the DNS group add reverse DNS for the ones that did not have it and they now work. So you need both a forward and reverse DNS for your server that is contacting Verizon vtext.com server.

I speculated that POL110 stands for something like Policy 110 since it is not a standard SMTP result message.

As for those having an rejection error I can not say for sure but it might be that your forward and reverse DNS entries for your server may not match or the FQDN your machines gives the vtext server does not match the domain in the reverse DNS. Or maybe something else but it is probably a good chance it has something to do with FQDN not matching.

Also I tried opening a ticket with Verizon unsuccessfully via my sales support person. He though they were end of life vtext.com but I think he just got mixed up with them shutting down the TAP (modem dial up) interface. At any rate there is a API that uses REST to send text but I have not tried it yet.

EcovaJosh

Thanks for that, Icain0943. I called VZW Business Support and they informed me that vtext.com is not a business service and is only meant for consumers. They said my mail domain can’t send to vtext.com because we are sending too high a volume of messages and the new spam filters they have in place are preventing the connection. I have to start using their “EMag” service instead which doesn’t actually work for me so we will be finding another solution for sending the SMS To our users.

monstermac77

In our discussions with Verizon, they said that they're currently phasing out @vtext.com, and we should use @vzwpix.com instead. We've changed a portion of our messages to use @vzwpix.com, but we are still receiving some failures (the same response from their server). Anybody else try this?

tauran

They shut me down on vzwpix.com as well.

I can't get access to EMag either, I get "

Account not authorized to access the EMAG Portal"

Wonderful customer service.

Weth

How many text messages were you sending? It is spam prevention.

Verizon_Support

tauran, we want you to have access to your pictures. We are here to provide support. Most customers have moved to our Verizon Cloud to view and manage their media. Can you tell us more about the problems you are having? What is the make and model of your phone?

For more information on the Verizon Cloud follow the link: http://vz.to/2gtYILH

RalphT_VZW
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If my response answered your question please click the 'Correct Answer' button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!

Verizon_Support

monstermac77

Hi vzw_customer_support,

Thanks for your response. I've verified that the domain we're sending from has a valid SPF record. We're still receiving these undeliverable messages and their rate seems to be increasing. We really need this resolved as soon as possible.

monstermac77

vzw_customer_support,

Any updates? This is a rather pressing issue.

Best,

Joe

DONNA_M_ZEIDLER

We are in the same situation. The service stopped working for us for messages originating at sunpharma.com on or about 11/25. We received a few messages December 2 but not a one since then.

We get the following bounce -- POL104, not POL110 as the others:

Message XXXXX to cellnumber@vtext.com bounced by destination server. Reason: 5.4.7 - Delivery expired (message too old) ('554',['vzw-ibgw-6003a.stratus.cloudmark.com cmsmtp ESMTP server not available - POL104 - BLRucFQcoJp18'])

The bounce occurs 3 days and 5 minutes after the original message was sent.

AaBron

How do we get this fixed? one of our IP addresses is blocked from verizon SMS. All other of our originating locations work, same email account. everything stop forwarding 11/23/2016.

getting: <sender rejected>

Verizon_Support

I understand the importance of being able to send messages, AaBron. Do you receive any other error messages besides '<sender rejected>' ? Also, when did this start happening?

TabithaJ_VZW Follow us on TWITTER @VZWSupport If my response answered your question please click the Correct Answer button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!

SAMRAU57

Wondering if anyone reached any conclusion/resolution to this issue? I'm having the same problem with an app sending maybe a dozen messages a day. We have both PTR and SPF records for our email domain, have tried sending to both vtext.com and vzwpix.com and both give a 550 sender rejected response.

Are there any other email to sms gateway domains for vzw besides these two?

Happy to provide logs, examples, timestamps, etc for further troubleshooting.

Verizon_Support

SAMRAU57, I am sorry to hear that you are still having difficulty with sending text messages using either Vtext or vzwpix. I know it's important for you to get your messages out. Vtext is for individual consumer use only, and may not work for commercial or other mass text message purposes.

Additional options would be to send these messages directly to the phone numbers, or secure email addresses as many of our customers can receive both text and email directly to their phones.

MichelleH_VZW

If my response answered your question please click the �Correct Answer� button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!

SAMRAU57

What do you mean "send these messages directly to the phone numbers"? Isn't that done by emailing phonenumber@vtext.com? If there's another method I'm open to trying it.

Email isn't always an option since some recipients don't have smart phones or are sometimes in locations where data connectivity is not reliable. Because SMS works reliably even on 1X connections, it is the preferred method of contact.

To be clear, we aren't sending mass notifications or commercial messages.

Verizon_Support

SAMRAU57, thank you for your patience and for providing the additional information, we will continue providing troubleshooting assistance regarding sending messages. Can you tell us more about the app and the content of the messages? How many recipients are you sending the messages to at the same time?

RalphT_VZW

If my response answered your question please click the 'Correct Answer' button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!