Why emails bounce (and how to fix deliverability issues without an email admin)
Blog post from Nylas
In the absence of a dedicated email administrator, understanding and resolving issues related to email deliverability can be challenging, yet manageable with the right approach. Common causes for emails being bounced or marked as spam include issues with SMTP IP reputation, sender domain reputation, DNS configuration, and header modifications. The process begins by determining whether the problem occurs exclusively when sending emails via a specific app or also through webmail clients like Outlook or Gmail. If the issue is confined to app-sent emails, checking for unintended header modifications and understanding the SMTP server differences between web clients and third-party applications is crucial. Shared SMTP server IPs, often used by third-party apps, can lead to deliverability problems if they are blacklisted due to other users' spam activities. Additionally, considering link tracking removal and analyzing full email headers can provide further insights into potential issues. If persistent problems occur, seeking new outbound SMTP IPs or consulting support documentation from providers like Microsoft or Google may be necessary.
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