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Mailgun messages from subdomain without MX record get rejected by some mail-providers

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Three possible solutions, in order of preference: Find a different DNS provider, that will allow you to put an MX on a subdomain. Note that this does not necessarily require you to change registrars. Use your base domain with mailgun, perhaps utilizing their forwarding feature to send incoming mails to whoever hosts your mailboxes. Use … Read more

Gmail unsubscribe link does not appear

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The unsubscribe option is only shown for senders with a high reputation: This only works for some senders right now. We’re actively encouraging senders to support auto-unsubscribe — we think 100% should. We won’t provide the unsubscribe option on messages from spammers: we can’t trust that they’ll actually unsubscribe you, and they might even send … Read more

In SMTP, must the RCPT TO: and TO: match?

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No, they don’t have to match. When the message is sent, the SMTP Server (aka Message Transfer Agent or MTA) is creating a so called SMTP envelope which contains the recipients and the sender of the message (see RFC5321): SMTP transports a mail object. A mail object contains an envelope and content. The SMTP envelope … Read more

Track mass email campaigns

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The code works in the following way: <style> /* Print stylesheet */ @media print{ #_t { background-image: url(‘https://a6.emltrk.com/XX0000XX?p’); } } /* Forward stylesheet */ div.OutlookMessageHeader, table.moz-email-headers-table, blockquote #_t { background-image:url(‘https://a6.emltrk.com/XX0000XX?f’) } </style> <!– Extra DIV –> <div id=”_t”></div> <!– Main Image –> <img src=”https://a6.emltrk.com/XX0000XX” style=”display:none” width=”1″ height=”1″ border=”0″ /> There is an image that gets … Read more

Mandrill Emails not reaching any mailbox, but Mandrill showing status ‘Delivered’

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The Mandrill Delivered-status in the UI doesn’t actually mean that it is sent, only that Mandrill have received the message for processing. This is of course extremely confusing. The only way of seeing if an email is actually sent (i.e. successfully delivered to the receiving mail server) is to see if the message has smtp-events. … Read more

Is there a work around google disabling “Less secure apps”?

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You could try authentification via “App password”. On your Google account: set 2-Step Verification ON create 16-character “App password”( How to create app password) -> result should be similar to: 16-character “App password” Instead of Google account password use 16-character password MailMessage mail = new MailMessage(); foreach (string receiver in DolociPrejemnike()) mail.To.Add(receiver); mail.From = new … Read more

How to fix mandrill / mailchimp transactional email issue recipient-domain-mismatch

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There is two possible cause for this issue: – 1. You’re on a Trial plan (aka DEMO MODE) While in demo mode, you can only send to verified sending domains that you’ve added to the account. This restriction is lifted when blocks are purchased and the account is fully activated. – 2. Your DNS settings … Read more

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