Questions tagged [sendgrid]

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550 The from address does not match a verified Sender Identity. Mail cannot be sent until this error is resolved

I followed this guide to setup a mail server in GCP. I am using SendGrid and have Domain Authentication and Single Server Verification successfully setup here. When I go a test email echo 'test' | ...
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0 answers
59 views

Sending emails via a mailing service with a sender whose domain I don't own

Let's suppose I own the email address luis@gmail.com (the real one is not gmail, but for the purposes of this example it will do) and I want to send emails via a service similar to SendGrid or Mailgun ...
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0 answers
149 views

Sendgrid IP Address Consistently Blocked on RATS-Spam

Overview For our application, we use SendGrid to send emails to many of our users. Recently over the past few weeks, our SendGrid IP addresses have been added to the RATS-Spam blacklist multiple times....
3 votes
3 answers
479 views

How to set up DNS settings with a domain in the middle for DKIM and SPF?

I am working on a tool that helps the users send emails. I plan on using an MTA (Mail Transfer Agent) in the back end like AWS-SES or Sendgrid etc. In order for the emails to arrive successfully in ...
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2 answers
538 views

Can I send emails using the php mail function with SendGrid smtp relay? [closed]

I have been trying to send emails from my app using the PHP mail function. I am currently hosted at DigitalOcean and the only way for me to send out emails is with services like SendGrid. I have done ...
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0 answers
258 views

Do CNAME mapping of my subdomain to Sendgrid for link branding using Amazon Cloudfront CDN

I want to have link branding with SSL on my domain example.com, so I created sub-domain abc.example.com, I want this abc.example.com to CNAME to sendgrid.net. I have done CNAME mapping but it seems ...
1 vote
0 answers
72 views

Can I add Teammate in GCP-connected SendGrid?

We are using SendGrid from Google Cloud Platform. When I clicked on "Add Teammate" on the SendGrid admin screen, I got the following response: > You can't add any more Teammates. Upgrade ...
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202 views

How to disable Sendgrid mail relay on Postfix

I have a Sendgrid account, and have setup Sendgrid to work with my Postfix mail server. However, I would like to disable Sendgrid as a mail relay. I followed this article to set up: https://serverok....
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476 views

How to get unblocked from email spam servers probably thanks to Sendgrid?

Some time ago, Sendgrid had a security breach which I THINK affected the company I am working for. Right now, emails sent to popular email servers like outlook are not arriving at the customers. ...
0 votes
0 answers
610 views

Does open rate of BCC affect deliverability?

Currently I BCC an internal email (records@mycompany.com) for all transactional emails, to keep records that we can easily look up I've just realised that this might negatively affect our ...
2 votes
2 answers
4k views

How do I whitelist another sender (e.g. Sendgrid) for DMARC?

We host our own e-mail but use Sendgrid to send mail on behalf of a few internal PHP services that can't easily handle our mail configuration (e.g. they disallow self-signed certs by default, so ...
0 votes
1 answer
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A business email puzzle: Can you combine gmail for staff emails, with another server for a larger-volume sendgrid emails?

We use Google for Business for our staff emails. But we also want to send out automated emails as part of a web-app. Gmail limits the number of emails you can send with a cap (a few hundred a day?), ...
0 votes
2 answers
764 views

postfix/smtpd Error : Recipient address rejected: [smtp.sendgrid.net]:2525

I am trying to figure what is the problem with my mail server on Google Cloud Platform. The problem is that none of the user can send mail out of the box, but they can send/receive email each other ...
2 votes
1 answer
2k views

Prevent from being spoofed by sendgrid

Recently we received an odd mail coming from adress1@company.com to address2@company.com The problem is that address1 didn't send any email to address2. The email was sent using sendgrid. Sendgrid ...
0 votes
1 answer
85 views

How can I decide which emails go through SMTP relay?

I am using postfix configuration that use SMTP relay on Sendgrid service like this: smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = noanonymous ...
1 vote
1 answer
513 views

SendGrid sent to spam on internal domain

I'm using SendGrid with a whitelabel to send email from my domain name, a-non-existent-account@example.com. The whitelabel works perfectly for outside delivery, but when sending to an inside account ...
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2 answers
3k views

Postfix: What's my default Relay Host when sending via different relay hosts?

I know that this might seems to be a lame question but hey , let me give it a try ... Hi, I am hosting different domains and trying to configure postfix to send mails through sendgrid for certain ...
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4 votes
3 answers
17k views

is it safe to delete /var/spool/mail/root

There is a specific server in the company I work that uses sendmail to send multiple emails to sendgrid. The file /var/spool/mail/root is about 4.9 GB, which is taking more than 50% of the disk usage. ...
1 vote
1 answer
2k views

What is wrong with my SASL?

So the story goes: I have a score of CentOS 6.9 virtual machines, migrated to Microsoft's Azure cloud by VHD upload. Once deployed I found out that Azure doesn't allow to send out email directly from ...
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3 votes
2 answers
3k views

Email from sendgrid are going to spam, spf & dkim pass & spamfilter itself says it isn't spam

At my work we use Sendgrid to send automatic e-mails to the users of our platform. Since a couple of days the e-mails are going to spam on hotmail.com & outlook.com. This is weird because the DNS ...
1 vote
1 answer
2k views

Please help in configuring Sendgrid and HostGator mx records

I am trying to send emails through Sendgrid SMTP and unfortunately, all emails were landing to spam. Upon checking from mail-tester.com service, I got to know an error message that "You are not ...
4 votes
2 answers
3k views

When DKIM is installed, will I still be able to send email for my domain from gmail?

Let's say I own example.com, that I install and configure dkim on my server (apt-get install opendkim opendkim-tools, etc.), and that I add the relevant public key to the domain's DNS records. Then ...
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-2 votes
1 answer
113 views

Postfix stop continuously

I just ask this question in unix.stackexchange.com but I did not get any answer. I hope will lucky in here at least. Please ignore the question's stupidity. I am a noob to linux. I was successfully ...
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1 vote
2 answers
6k views

.NET, to SendGrid, to Gmail getting From Header missing

I received this message below within SendGrid that was being sent to Gmail. However this has always worked, and of course I am have a FROM email address included. Is this something else or a bug? ...
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1 vote
2 answers
1k views

EXIM relay only if recipient is at hotmail.com [closed]

I'm currently using a relay service (mailchannels and sendgrid) to send about 200k messages per month of our cPanel services, but I'd like to route only messages that have HOTMAIL recipients (because ...
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0 votes
2 answers
203 views

suspicious outgoing emails from my Microsoft Exchange Server 2013 box (sendgrid)

I have an on-site Exchange Server 2013 environment. We use sendgrid for outgoing e-mail delivery. I was just browsing through our sendgrid account (I don’t do that often), and I noticed a LOT of “...
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6 votes
3 answers
3k views

Migrating Email Providers; Are Multiple DKIM Records Viable During Transition?

I am currently gathering requirements for a small (hopefully) project of migrating from SendGrid to Mandrill as a transactional email service provider. We have been using SendGrid for close to 3-4 ...
4 votes
1 answer
3k views

Exim not always sending AUTH LOGIN username/password

We are sending mail using exim (configured through WHM). With the same exact configuration, seemingly most of the time exim sends the correct AUTH LOGIN username and password, however sometimes it is ...
4 votes
2 answers
3k views

Configuring white labeling between sendgrid and 1and1.com

I'm struggling to configure white labeling between sendgrid and 1and1.com. Sendgrid asks me to create a variety of subdomains on my domain registrar with specific CNAME values. I'm able to create ...
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2 votes
2 answers
2k views

Will adding an MX record for email forwarding conflict with an email provider like sendgrid

I'm planning on receiving email/forwarding email using postfix, but sending email using sendgrid. According to this tutorial, I need an MX record pointing to my machine - http://www.andreagrandi.it/...
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0 votes
1 answer
1k views

How does the DKIM from SendGrid prevent me from spoofing my email adress?

I'm making use of SendGrid to send automatic emails. First I went to the whole hassle of creating a DKIM record, before I recently discovered the whole record doesn't seem to be checked anyway, ...
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0 votes
1 answer
82 views

Sending bulk / single emails from a single domain [duplicate]

Let me explain our situation: We have a web application that uses subdomains for each customer instance: customer1.example.com customer2.example.com Every instance can have over 500 users, which ...
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1 vote
1 answer
2k views

Postfix: use relayhost only when direct delivery not specified

I read up on using relayhost with Postfix 2.6.6. It's possible to use different relay hosts, with different credentials, for different senders. But how do I use direct delivery with specific senders (...
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1 vote
1 answer
2k views

EXIM - 550 Cannot receive from specified address - Sendgrid

We're having some intermediate issues with exim where some emails go through and then others get the 550 Cannot receive from specified address Error. This is the guide we used to setup EXIM: https://...
user avatar
3 votes
1 answer
4k views

postfix ignores relayhost

I have setup a sendgrid relayhost on my postfix server. This works perfectly when sending mails via sendmail: May 24 16:21:13 ip-*-*-*-* postfix/smtp[17742]: 542D01CDF: to=<mail@externaladdress....
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2 votes
1 answer
368 views

running localhost mta vs. php smtp'ing via 3rd party api

so the question is, would it be "better" to run localhost mta (ie. postfix) or "better" to use 3rd party restful api, embedded in the application, to send email? i am curious what people would do ...
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0 votes
1 answer
726 views

In Heroku's add-on of Sendgrid, how come I don't have to enter TXT fieldn in my DNS records?

When I used Amazon SES, I had to put TXT records in my DNS so that Yahoo/Gmail knows that the server is allowed to send from my domain name. However, when I signed up for Heroku and Sendgrid Add-on (...
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3 votes
1 answer
3k views

How to correctly add SPF record

I need to add a SendGrid SPF record for my GoDaddy domain, but I'm not sure exactly where to put it. I have an existing TXT record for @ with value of google-site-verification=XXXXXXXXXXXXXXXXXXXXXXXX....
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1 vote
1 answer
425 views

Using a local MTA as gateway to Sendgrid

I am setting up an email system using Interspire Email Marketer with 5 user accounts, and each user has their own Sendgrid account. We are trying to build a fast system, so we have a dedicated MySQL ...
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1 vote
3 answers
692 views

Does using a 'foreign' domain as email sender reduce email reputation?

We want to send emails through our webapp. Users of the app provide their email adresses. In some cases, we want to send transactional email from the webapp, using the current user as a sender. Does ...
1 vote
0 answers
1k views

IIS 6 Smart Host Outbound Security

I'm using the IIS 6 smart host setting to forward all email sent through IIS to SendGrid. It works fine if I set the Outbound Security and smart host settings at the top level of the Default SMTP ...
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-2 votes
3 answers
284 views

Cloud service to receive up to 30000 emails a minute [closed]

I am building a business where I want the infrastructure to be able to handle up to 30000 emails per minute during peak periods. The question is what kinds of services offer this? I expect to download ...
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1 vote
2 answers
3k views

Configuring Postfix with other SMTP provider

I want to use SendGrid as my email sending service, but want to also use Postfix's internal queue mechanism to manage the emails sent through Sendgrid. So basically what I want to do is to configure ...
3 votes
2 answers
3k views

Postfix not sending email after upgrading to Ubuntu 12.04

After upgrading a server from Ubuntu 10.04 to 12.04, postfix is no longer sending email through sendgrid.com. I followed this guide about 6 months ago and everything had been working perfectly until ...
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0 votes
1 answer
296 views

Sendgrid - non-virtual recipients

I need some help understanding the nature of this service with relation to incoming emails. We have adopted SendGrid for ensuring deliverability of our application's emails (automated stuff like ...
2 votes
1 answer
4k views

OTRS - configure smtp to add a custom sendgrid header?

I'd like to be able to configure OTRS ticket system to send email through sendgrid but I also want to add some configuration parameters through the X-SMTPAPI sendgrid header. There's no obvious ...
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5 votes
3 answers
9k views

Prepend X-header to all relayed messages in Postfix

I've got several production servers running a LAMP stack. They each have a local Postfix server catching any mail from the system and from PHP, and relaying it via a smarthost (the SendGrid SMTP ...