发开发信是外贸客户开发的主要方法。但怎么写开发邮件避免被屏蔽却是一个问题。如果邮件中包含过多促销、广告或营销类内容，使用大量大写字母、感叹号或常见的垃圾邮件关键词（如“free”、“Winner”等），容易触发垃圾邮件过滤器。没有正确设置邮件身份认证记录，也会让收件服务器怀疑邮件的真实性，从而将其屏蔽或标记为垃圾邮件。
一、技术配置与合规性
1.使用不可靠的第三方邮件发送服务也可能导致邮件送达率下降。选择支持多IP轮换、自动域名认证的服务商如我之前推荐的五大邮件营销平台都是比较知名比较可靠的，可以根据自身需求选择合适自己的。
2.配置SPF记录验证发件服务器合法性，DKIM签名确保邮件内容未被篡改，DMARC策略提升域名信誉（一般邮件营销平台绑定自己网站的域名去发送就可以）
二、内容优化技巧
1. 避免敏感词（如“免费”“促销”“点击这里”），标题简短，包含用户姓名或个性化信息（如“John，您的新品推荐”，有些平台可以设置发送时自动带上客户名字）。避免全大写、感叹号及特殊符号（如“‼️限时折扣‼️”）
2.文字与图片比例平衡（图片不超过3张），避免纯图片邮件（部分邮箱默认屏蔽图片）。减少超链接数量，用短链接替代PDF（如Bit.ly）
确保邮件不被屏蔽的关键在于发送前的准备工作，包括优化邮件内容、正确配置身份认证记录、合理控制发送频率和维护良好的发件人信誉。通过这些措施，可以显著提高邮件的送达率，减少被屏蔽的风险。
英文邮件绝对要避免的垃圾邮件触发词：
- #1
- 100% more
- 100% free
- 100% satisfied
- Additional income
- Be your own boss
- Best price
- Big bucks
- Billion
- Cash bonus
- Cents on the dollar
- Consolidate debt
- Double your cash
- Double your income
- Earn extra cash
- Earn money
- Eliminate bad credit
- Extra cash
- Extra income
- Expect to earn
- Fast cash
- Financial freedom
- Free access
- Free consultation
- Free gift
- Free hosting
- Free info
- Free investment
- Free membership
- Free money
- Free preview
- Free quote
- Free trial
- Full refund
- Get out of debt
- Get paid
- Giveaway
- Guaranteed
- Increase sales
- Increase traffic
- Incredible deal
- Lower rates
- Lowest price
- Make money
- Million dollars
- Miracle
- Money back
- Once in a lifetime
- One time
- Pennies a day
- Potential earnings
- Prize
- Promise
- Pure profit
- Risk-free
- Satisfaction guaranteed
- Save big money
- Save up to
- Special promotion
避免使用会造成不必要紧迫感和压力的垃圾词：
- Act now
- Apply now
- Become a member
- Call now
- Click below
- Click here
- Get it now
- Do it today
- Don’t delete
- Exclusive deal
- Get started now
- Important information regarding
- Information you requested
- Instant
- Limited time
- New customers only
- Order now
- Please read
- See for yourself
- Sign up free
- Take action
- This won’t last
- Urgent
- What are you waiting for?
- While supplies last
- Will not believe your eyes
- Winner
- Winning
- You are a winner
- You have been selected
避免使用看起来像可疑、垃圾或不道德行为的垃圾邮件词语
- Bulk email
- Buy direct
- Cancel at any time
- Check or money order
- Congratulations
- Confidentiality
- Cures
- Dear friend
- Direct email
- Direct marketing
- Hidden charges
- Human growth hormone
- Internet marketing
- Lose weight
- Mass email
- Meet singles
- Multi-level marketing
- No catch
- No cost
- No credit check
- No fees
- No gimmick
- No hidden costs
- No hidden fees
- No interest
- No investment
- No obligation
- No purchase necessary
- No questions asked
- No strings attached
- Not junk
- Notspam
- Obligation
- Passwords
- Requires initial investment
- Social security number
- This isn’t a scam
- This isn’t junk
- This isn’t spam
- Undisclosed
- Unsecured credit
- Unsecured debt
- Unsolicited
- Valium
- Viagra
- Vicodin
- We hate spam
- Weight loss
- Xanax
避免使用专业术语或法律术语
- Accept credit cards
- Ad
- All new
- As seen on
- Bargain
- Beneficiary
- Billing
- Bonus
- Cards accepted
- Cash
- Certified
- Cheap
- Claims
- Clearance
- Compare rates
- Credit card offers
- Deal
- Debt
- Discount
- Fantastic
- In accordance with laws
- Income
- Investment
- Join millions
- Lifetime
- Loans
- Luxury
- Marketing solution
- Message contains
- Mortgage rates
- Name brand
- Offer
- Online marketing
- Opt in
- Pre-approved
- Quote
- Rates
- Refinance
- Removal
- Reserves the right
- Score
- Search engine
- Sent in compliance
- Subject to…
- Terms and conditions
- Trial
- Unlimited
- Warranty
- Web traffic
- Work from home
适当调整语言表达和保持邮件整体内容专业、自然，有助于降低被屏蔽风险。当然也不必百分比完美（真全部严格去掉关键词，内容可能会缺乏一些吸引力，灵活变通），能达到送达率在95%以上，就已经非常不错了。
