Forum Discussion
Trying to find help for 550 5.7.511 Access denied, banned sender
bootahit depends on your current mail server... as I run my own server I have full control over it. So I can modify postfix's config files. The smtp.com article how to do it is here https://kb.smtp.com/article/944-postfix. I used to use Sendgrid some time ago, and its the same principle. In fact, I guess any 3rd party SMPT service can be used. It results in Postfix sending ALL email on the server through another SMTP account. My users still connect to their email accounts on our server, so they dont need to change any settings, but then our server uses another SMTP account to send them. That account would then have a different IP and is not blocked.
Yes they would mostly have a fee. I dont know of free ones, or if they were any good. This is why its temporary for me, I dont want to keep paying the additional cost. The cost will depend on how many emails you send through it per month. Its not a big cost even up to 100,000, but as its a business service I provide, so my customers pay me, I have no choice than to pay to get it working until Microsoft find someone who knows what they are doing.
If the cost is high, an alternative is create another server just like your mail server, if the cost for that is much less than sendgrid etc. and send through that. I think you can send through any server an email account to send through (I think, I have not tried it but dont see why not). Although it gets a bit advanced then because smtp.com have done something with the return path in order to link the sending to the originating domain SPF record which is important to not get caught as spam.
